ECG interpretation in urgent care is a high-stakes clinical skill because a tracing may reveal immediately life-threatening ischemia, unstable dysrhythmia, conduction disease, electrolyte disturbance, or medication effect. Equally important, a normal or nondiagnostic ECG does not exclude acute coronary syndrome (ACS), pulmonary embolism, aortic pathology, myocarditis, or other serious disease. The urgent care goal is not to provide definitive cardiology interpretation for every abnormality; it is to rapidly identify time-sensitive findings, correlate them with the patient’s presentation, stabilize when appropriate, and arrange emergency transfer without delay when the setting exceeds clinic capabilities.

Clinical overview

A 12-lead ECG is most useful when obtained for a clinical question: chest discomfort, dyspnea, palpitations, syncope or near-syncope, unexplained weakness, dizziness, altered mental status, suspected toxicologic or electrolyte abnormality, or an abnormal pulse or monitor rhythm. It should be interpreted in the context of vital signs, symptoms, examination findings, prior ECGs, medications, and available point-of-care testing.

Urgent care clinicians should use a consistent approach rather than relying on the computerized interpretation. Automated ECG statements can be helpful prompts, but machine algorithms vary and require clinician overread and clinical correlation.[1] A tracing that is technically poor, incorrectly acquired, or interpreted without the patient at the bedside can create false reassurance or false alarms.

Must-not-miss diagnoses and red flags

Before performing a detailed ECG analysis, determine whether the patient has an unstable condition. Activate emergency medical services (EMS), begin local emergency protocols, and transfer by monitored ambulance rather than private vehicle when any of the following are present:

• Persistent ischemic chest discomfort, anginal equivalent, or concerning symptoms with new ischemic ECG changes.
• ST-segment elevation or depression concerning for acute coronary occlusion, dynamic ischemic changes, hyperacute-appearing T waves in an appropriate clinical setting, or a new/presumed new conduction abnormality with symptoms concerning for ischemia.
• Wide-complex tachycardia, polymorphic ventricular tachycardia, ventricular fibrillation, or a regular tachyarrhythmia with hypotension, shock, acute heart failure, ischemic discomfort, or altered mental status.
• Symptomatic bradycardia, high-grade atrioventricular block, complete heart block, or pauses associated with poor perfusion, syncope, ischemia, or heart failure.
• Marked QT prolongation with syncope, ventricular ectopy, or suspected torsades de pointes.
• ECG findings plus clinical concern for hyperkalemia, severe hypokalemia, sodium-channel blocker toxicity, digoxin toxicity, pulmonary embolism, myocarditis, pericarditis with tamponade physiology, aortic dissection, or acute stroke.
• Any patient who is clinically deteriorating, requires continuous monitoring or intravenous antiarrhythmic therapy, or may require cardioversion, pacing, defibrillation, serial troponins, advanced imaging, or specialty consultation unavailable in the clinic.

For adults with a pulse, the American Heart Association defines cardiopulmonary compromise by hypotension, acutely altered mental status, signs of shock, ischemic chest discomfort, or acute heart failure. These features, rather than an isolated heart-rate number, determine urgency.[6] If the patient is pulseless or has agonal respirations, initiate resuscitation and use the clinic’s cardiac arrest protocol immediately.

Focused history and examination

Focused history

Obtain a concise history while the ECG is being acquired or reviewed. Establish symptom onset, duration, provoking factors, character, associated diaphoresis, dyspnea, nausea, presyncope, syncope, palpitations, fever, pleuritic pain, exertional symptoms, and prior episodes. Ask about known coronary disease, prior myocardial infarction, heart failure, atrial fibrillation, congenital heart disease, valvular disease, pacemaker or implantable cardioverter-defibrillator, prior ablation, and prior ECG abnormalities.

Review medications and exposures carefully. Important examples include beta-blockers, nondihydropyridine calcium-channel blockers, digoxin, antiarrhythmics, diuretics, stimulant medications, cocaine or methamphetamine, thyroid replacement, antipsychotics, antidepressants, antiemetics, antimicrobials with QT-prolonging potential, and over-the-counter or herbal products. Ask about vomiting, diarrhea, poor intake, dialysis, renal failure, and missed dialysis because electrolyte disorders may produce important ECG changes before confirmatory laboratory results are available.

For possible ischemia, identify cardiovascular risk factors but do not use their absence to dismiss concerning symptoms. Women, older adults, and patients with diabetes may present with dyspnea, fatigue, epigastric discomfort, nausea, weakness, or reduced exercise tolerance rather than classic substernal pressure. The chest pain guideline recommends attention to accompanying symptoms and avoidance of labeling symptoms as simply “atypical,” which can minimize risk.[3]

Focused examination

Assess airway, breathing, circulation, mental status, skin perfusion, and repeat vital signs. Note oxygen saturation, blood pressure in both arms when clinically relevant, pulse regularity, signs of heart failure, murmurs, jugular venous distention, edema, calf asymmetry, fever, dehydration, and focal neurologic deficits. A normal examination does not rule out ACS or an unstable rhythm.

Obtaining a diagnostically useful ECG

Technical quality is part of ECG interpretation. Standard recordings are usually performed at 25 mm/second and 10 mm/mV. Confirm the settings before measuring intervals or comparing serial tracings. Keep the patient supine and still when feasible; warm the patient if tremor is producing artifact; prepare skin adequately; and ensure secure electrode contact.

Incorrect lead placement can mimic infarction, axis deviation, chamber enlargement, or poor R-wave progression. Suspect limb-lead reversal when lead I is unexpectedly negative, aVR is unexpectedly positive, or the limb-lead pattern does not fit the clinical context. Suspect precordial misplacement when R-wave progression is implausible or differs abruptly from a prior tracing without a clinical explanation. If the ECG is inconsistent with the patient’s appearance or prior ECG, repeat it with deliberate lead placement before anchoring on a diagnosis.

For suspected inferior ischemia, obtain right-sided leads when right ventricular involvement is possible. For ongoing ischemic symptoms with a nondiagnostic standard ECG, consider posterior leads according to local protocol and capability. Serial ECGs are appropriate when suspicion for ACS remains high because ischemic changes may evolve; a normal initial ECG does not exclude ACS or posterior ischemia.[3,4]

A systematic interpretation sequence

Use the same sequence every time. A practical order is: verify patient and tracing quality; determine rate; assess rhythm; evaluate axis; measure intervals; inspect P waves and QRS morphology; evaluate ST segments, T waves, and Q waves; compare with prior ECG; then integrate the findings with the clinical presentation.

1. Verify identity, calibration, and quality

• Confirm patient identifiers, date and time, speed, gain, and whether the ECG was obtained during symptoms.
• Identify baseline wander, motion artifact, muscle tremor, loose electrodes, electrical interference, and possible lead reversal.
• Document whether a prior ECG was available and whether the current tracing differs from baseline.

2. Determine rate

For a regular rhythm, divide 300 by the number of large boxes between consecutive R waves. For irregular rhythms, count QRS complexes over a 10-second strip and multiply by 6. A rate alone does not establish stability. Sinus tachycardia may reflect pain, fever, hypovolemia, hemorrhage, hypoxemia, pulmonary embolism, sepsis, stimulant use, thyrotoxicosis, or myocardial ischemia; treatment should target the cause rather than simply suppressing the rate.

3. Assess rhythm

Ask whether the rhythm is regular, regularly irregular, or irregularly irregular. Determine whether a P wave precedes every QRS, whether every P wave is followed by a QRS, and whether the PR interval is constant.

• Sinus rhythm: Usually has upright P waves in lead II and negative P waves in aVR, with a consistent P-wave morphology before each QRS.
• Atrial fibrillation: Usually produces an irregularly irregular ventricular rhythm without discrete, consistent P waves. Confirm on the tracing; wearable-device alerts and automated interpretations alone do not establish the diagnosis.[5]
• Atrial flutter: May show organized atrial activity, often most apparent in inferior leads or V1. A ventricular rate near 150 beats/min should prompt consideration of flutter with 2:1 conduction.
• Regular narrow-complex tachycardia: Could be sinus tachycardia, atrioventricular nodal reentrant tachycardia, atrioventricular reentrant tachycardia, atrial tachycardia, or flutter. In urgent care, first determine whether the patient is unstable and whether the rhythm is truly narrow and regular.
• Wide-complex tachycardia: Treat a regular wide-complex tachycardia as ventricular tachycardia unless a more benign diagnosis is clearly established by an experienced clinician. Do not delay transfer while attempting exhaustive rhythm discrimination.

4. Evaluate axis and intervals

A quick axis screen uses leads I and aVF. A positive QRS in both is generally consistent with a normal adult frontal axis; discordance may indicate left or right axis deviation. Axis is supportive rather than diagnostic and must be interpreted with age, body habitus, conduction pattern, and prior ECGs in mind.

Measure the PR interval, QRS duration, and QT/QTc. A prolonged PR interval may represent first-degree atrioventricular block. A QRS duration of 120 ms or more is wide and raises concern for bundle branch block, ventricular rhythm, pre-excitation, metabolic disturbance, or medication effect. QTc interpretation depends on heart rate and correction formula; automated QTc values should be verified when management may change. A prolonged QTc is especially concerning when accompanied by syncope, hypokalemia, hypomagnesemia, bradycardia, multiple QT-prolonging medications, or ventricular ectopy.

5. Inspect QRS morphology and conduction

Look for bundle branch block, fascicular block, ventricular pacing, pre-excitation, pathologic Q waves, and poor R-wave progression. A new bundle branch block in a symptomatic patient deserves caution, but bundle branch block alone is not synonymous with acute myocardial infarction. In suspected ACS, compare with prior tracings and assess for concordant or otherwise concerning ST-segment changes; emergency evaluation is appropriate when symptoms or ECG findings suggest acute ischemia.[3,4]

A short PR interval with a delta wave and widened QRS suggests ventricular pre-excitation. Patients with pre-excitation plus palpitations, syncope, atrial fibrillation, or a rapid wide-complex rhythm require emergency evaluation. Avoid assuming that all irregular wide-complex rhythms are atrial fibrillation with routine aberrancy.

6. Evaluate ST segments, T waves, and Q waves

Assess each lead in relation to contiguous leads and the clinical story. Look for ST elevation, ST depression, T-wave inversion, hyperacute T waves, reciprocal changes, and new pathologic Q waves. Standard ST-elevation criteria vary by lead, sex, and age; in general, concerning ST elevation is measured at the J point in at least two anatomically contiguous leads. ECG changes must be interpreted in the setting of baseline repolarization abnormalities such as left ventricular hypertrophy, left bundle branch block, ventricular pacing, early repolarization, pericarditis, and electrolyte disturbance.[2]

Diffuse concave ST elevation with PR depression may support pericarditis in the right clinical context, but does not eliminate the need to consider STEMI or myopericarditis. ST depression in anterior precordial leads with tall R waves can suggest posterior ischemia. New, dynamic, or persistent ischemic changes with symptoms should trigger EMS transfer for serial ECGs, cardiac biomarkers, monitoring, and definitive management; urgent care should not attempt to rule out ACS using a single tracing.

Common urgent care ECG patterns and immediate implications

• Sinus bradycardia: Consider medications, athletic conditioning, hypothermia, hypothyroidism, ischemia, hypoxemia, increased vagal tone, and electrolyte abnormalities. Transfer if symptomatic or associated with poor perfusion, high-grade block, or ischemic symptoms.
• Second-degree Mobitz I block: May be transient or medication-related, but clinical context matters. New symptomatic cases, wide QRS complexes, suspected ischemia, or uncertainty about the level of block warrant emergency evaluation.
• Mobitz II, high-grade block, or complete heart block: Emergency transfer and continuous monitoring are indicated, even if the patient is temporarily compensated.
• Atrial fibrillation or flutter: Determine stability and symptom onset, screen for ischemia, heart failure, infection, thyroid disease, stimulant exposure, and electrolyte disturbance. New-onset, rapid, symptomatic, or uncertain-duration arrhythmia commonly exceeds routine urgent care management because cardioversion and anticoagulation decisions require individualized risk assessment.
• Hyperkalemia pattern: Peaked T waves, PR prolongation, QRS widening, loss of P waves, sine-wave morphology, or bradyarrhythmia may occur, but ECG findings do not reliably grade potassium severity. Obtain urgent laboratory confirmation when possible without delaying EMS transfer in a concerning patient.
• Long QT pattern: Review all medications and electrolyte risks. Syncope, polymorphic ventricular ectopy, or a prolonged QTc with symptoms requires emergency transfer and monitoring.

Special populations and diagnostic pitfalls

Pregnancy and postpartum patients

Pregnancy changes baseline hemodynamics and can increase heart rate, but it does not make concerning ECG findings benign. Chest pain, dyspnea, syncope, palpitations, hypoxemia, or ischemic changes require a differential that includes pulmonary embolism, peripartum cardiomyopathy, spontaneous coronary artery dissection, hypertensive disorders of pregnancy, aortic disease, and arrhythmia. Transfer promptly when symptoms are concerning; do not withhold emergency evaluation because of pregnancy.

Pediatric patients

Normal ECG parameters are age dependent. Rightward axis, higher heart rates, and precordial T-wave patterns that would be abnormal in adults may be normal in infants and children. Conversely, pediatric syncope during exertion, palpitations with instability, a family history of sudden unexplained death, cardiomyopathy, channelopathy, or an abnormal ECG should prompt emergency or pediatric cardiology-directed evaluation. Do not apply adult interval and axis thresholds without age-specific reference ranges.[1]

Older adults and patients with renal or hepatic impairment

Older adults may have atypical ACS presentations, baseline conduction disease, polypharmacy, and reduced physiologic reserve. Renal dysfunction increases the likelihood of potassium abnormalities and complicates interpretation of troponin values; serial testing and clinical context are essential. Hepatic or renal impairment can increase exposure to medications that slow conduction or prolong QT. An abnormal ECG in these populations should prompt a thorough medication reconciliation and a lower threshold for emergency evaluation.

Management and disposition in urgent care

Urgent care management is principally triage, stabilization, and safe transition of care. Place unstable or potentially unstable patients in a monitored area, obtain repeat vital signs, establish intravenous access if within clinic capability and transfer is being arranged, provide oxygen only for hypoxemia or respiratory distress, and follow local ACLS and EMS protocols. Do not delay transport for nonessential testing, prolonged observation, or attempts to normalize an abnormal rhythm in a clinic without the required monitoring, medications, equipment, staff, and transfer capability.[6]

Stable patients with clearly chronic and unchanged ECG findings may sometimes be managed as outpatients, but only after the clinician has assessed symptoms, compared prior ECGs when available, considered dangerous alternatives, and ensured reliable follow-up. Examples may include asymptomatic sinus bradycardia in a conditioned athlete, a known unchanged bundle branch block, or isolated premature beats without red flags. This is not an automatic discharge category: syncope, exertional symptoms, chest discomfort, dyspnea, significant family history, new ECG changes, or inability to obtain timely follow-up should shift disposition toward emergency evaluation.

Medication initiation for arrhythmias, anticoagulation, antiarrhythmics, or electrolyte correction should be guided by the confirmed diagnosis, hemodynamic status, current laboratory data, comorbidities, pregnancy status, renal and hepatic function, drug interactions, allergies, local protocols, and the destination facility’s plan. Independent verification of current medication dosing, contraindications, and guideline recommendations is required before clinical use.

Documentation considerations

• Indication for ECG, symptom onset, relevant associated symptoms, and whether the tracing was obtained during symptoms.
• Vital signs, focused examination, stability assessment, and serial reassessments.
• Technical limitations, repeat ECGs, right-sided or posterior leads, and comparison with prior ECGs when available.
• Your interpretation using descriptive language: rate, rhythm, intervals, conduction findings, ST-T changes, and important uncertainty.
• Computer interpretation as supplemental information only, not as the sole final interpretation.
• Consultations, EMS activation time, transfer destination, mode of transport, treatments provided under protocol, and condition at transfer.
• For outpatient disposition, the rationale, follow-up plan, and explicit return/emergency precautions.

Clinical takeaways

• Interpret the patient before interpreting the ECG: instability and ischemic symptoms override a reassuring-looking tracing.
• Confirm tracing quality and lead placement before diagnosing infarction, axis abnormality, or chamber enlargement.
• Use a fixed sequence: quality, rate, rhythm, axis, intervals, QRS morphology, ST-T findings, comparison, and clinical integration.
• A normal ECG does not rule out ACS, pulmonary embolism, aortic disease, myocarditis, or evolving arrhythmia.
• New or dynamic ischemic changes, symptomatic bradycardia, high-grade block, wide-complex tachycardia, and unstable tachyarrhythmia require emergency transfer.
• When uncertainty remains, repeat the ECG, compare a prior tracing, reassess the patient, and choose the safer disposition.

References

1. Kligfield P, Gettes LS, Bailey JJ, Childers R, Deal BJ, Hancock EW, et al. Recommendations for the standardization and interpretation of the electrocardiogram: part I: the electrocardiogram and its technology. Circulation. 2007;115(10):1306-1324. doi:10.1161/CIRCULATIONAHA.106.180200.
2. Wagner GS, Macfarlane P, Wellens H, Josephson M, Gorgels A, Mirvis DM, et al. AHA/ACCF/HRS recommendations for the standardization and interpretation of the electrocardiogram: part VI: acute ischemia/infarction. J Am Coll Cardiol. 2009;53(11):1003-1011. doi:10.1016/j.jacc.2008.12.016.
3. Gulati M, Levy PD, Mukherjee D, Amsterdam E, Bhatt DL, Birtcher KK, et al. 2021 AHA/ACC/ASE/CHEST/SAEM/SCCT/SCMR guideline for the evaluation and diagnosis of chest pain: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. J Am Coll Cardiol. 2021;78(22):e187-e285. doi:10.1016/j.jacc.2021.07.053.
4. Rao SV, O’Donoghue ML, Ruel M, Rab T, Tamis-Holland JE, Alexander JH, et al. 2025 ACC/AHA/ACEP/NAEMSP/SCAI guideline for the management of patients with acute coronary syndromes: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. J Am Coll Cardiol. 2025;85(22):2135-2237. doi:10.1016/j.jacc.2024.11.009.
5. Joglar JA, Chung MK, Armbruster AL, Benjamin EJ, Chyou JY, Cronin EM, et al. 2023 ACC/AHA/ACCP/HRS guideline for the diagnosis and management of atrial fibrillation: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. 2024;149(1):e1-e156. doi:10.1161/CIR.0000000000001193.
6. Wigginton JG, Agarwal S, Bartos JA, Coute RA, Drennan IR, Haamid A, et al. Part 9: advanced life support: 2025 American Heart Association guidelines for cardiopulmonary resuscitation and emergency cardiovascular care. Circulation. 2025;152(suppl 2):S538-S577. doi:10.1161/CIR.0000000000001376.

Educational disclaimer: This article is intended for clinician education and does not replace individualized clinical judgment, local protocols, emergency medical services direction, specialist consultation, or current institutional guidance. ECG interpretation and treatment decisions must be individualized to the patient and setting. Independently verify current guidelines, medication dosing, contraindications, interactions, and product information before clinical use.

Chest pain urgent care encounters require a deliberately risk-averse approach. Most patients will not have acute coronary syndrome (ACS), but the consequences of missing ACS, pulmonary embolism (PE), acute aortic syndrome, pneumothorax, esophageal rupture, myocarditis, or other time-sensitive disease are substantial. Urgent care clinicians should prioritize rapid identification of instability and conditions that require emergency department (ED) evaluation rather than attempting to definitively diagnose every cause of chest discomfort in the ambulatory setting.

This guide addresses evaluation of undifferentiated acute or subacute chest pain in urgent care. It is not a substitute for local transfer protocols, emergency medical services (EMS) medical direction, institutional ECG and troponin pathways, or current specialty guidelines.

Clinical overview and significance

“Chest pain” includes pressure, tightness, heaviness, burning, discomfort, or pain located in the chest, shoulders, arms, neck, jaw, back, epigastrium, or upper abdomen. Dyspnea, diaphoresis, nausea, fatigue, presyncope, syncope, and unexplained weakness may be anginal equivalents, particularly in older adults, women, and patients with diabetes or chronic kidney disease.[1]

The urgent care objective is not simply to identify musculoskeletal or gastrointestinal causes. It is to determine whether a potentially life-threatening cardiopulmonary, vascular, or thoracic process is reasonably possible and whether the clinic has the diagnostic capability, monitoring, staff, and transfer resources necessary to safely manage the patient. A normal appearance, a reassuring single ECG, pain reproducible with palpation, or symptom improvement after an antacid does not independently exclude ACS or other emergencies.

Immediate triage and stabilization

Use a front-end process that obtains vital signs promptly and brings concerning patients to a monitored area without delay. Assess airway, breathing, circulation, mental status, and perfusion. Obtain a focused initial history while arranging a 12-lead ECG; do not delay ECG acquisition for a detailed history or registration process.

Activate EMS or arrange emergency transfer immediately for any of the following

• Hemodynamic instability, shock, altered mental status, cyanosis, severe respiratory distress, persistent hypoxemia, or syncope with ongoing symptoms.
• Ongoing ischemic-sounding chest discomfort, especially with diaphoresis, dyspnea, nausea, pallor, or radiation to the arm, jaw, back, or epigastrium.
• New ischemic ECG findings, including ST-segment elevation, dynamic ST-segment depression, concerning T-wave changes in the appropriate clinical context, or a new/presumed new left bundle-branch block with symptoms concerning for occlusion MI.
• Ventricular tachycardia, unstable bradyarrhythmia, high-grade atrioventricular block, rapid arrhythmia with ischemic symptoms, or any rhythm associated with instability.
• Concern for acute aortic syndrome, PE, tension pneumothorax, pericardial tamponade, esophageal rupture, severe pneumonia/sepsis, acute heart failure, or another emergent diagnosis.
• Persistent symptoms despite initial supportive care, recurrent symptoms during observation, or inability to establish a safe low-risk disposition.

Patients requiring ED evaluation should generally be transported by EMS rather than private vehicle. EMS enables monitoring, repeat ECGs, treatment escalation, and rapid response to deterioration. Maintain observation, obtain serial vital signs, and reassess symptoms while awaiting transfer. Do not allow a patient with suspected ACS or another unstable condition to drive.

Focused history

Use a structured but efficient history. The quality of the history matters more than whether a symptom is described as “typical” or “atypical”; current guidance discourages dismissive labeling because ischemic presentations vary substantially.[1]

Characterize the symptom

• Onset: abrupt versus gradual; symptoms maximal at onset raise concern for acute aortic syndrome, pneumothorax, PE, or rupture.
• Provocation: exertion, emotional stress, cold exposure, meals, swallowing, position, inspiration, cough, movement, or palpation.
• Quality and location: pressure/heaviness, sharp pain, burning, tearing, pleuritic pain, focal tenderness, retrosternal or epigastric discomfort.
• Radiation: arm, shoulder, jaw, neck, interscapular back, abdomen, or flank.
• Timing: duration, progression, frequency, pain at rest, nocturnal symptoms, and whether symptoms are new, accelerating, or different from established angina.
• Associated symptoms: dyspnea, diaphoresis, nausea/vomiting, palpitations, presyncope/syncope, fever, cough, hemoptysis, unilateral leg symptoms, neurologic deficits, or dysphagia.

Assess risk and context

• Known coronary artery disease, prior myocardial infarction, coronary intervention, heart failure, valvular disease, arrhythmia, cardiomyopathy, or aortic aneurysm/dissection.
• Hypertension, diabetes, dyslipidemia, smoking/nicotine use, stimulant use, obesity, chronic kidney disease, inflammatory disease, and family history of premature coronary disease or sudden death.
• PE risks: prior venous thromboembolism, active cancer, recent surgery/trauma, immobilization, long travel, estrogen exposure, pregnancy/postpartum status, thrombophilia, and unilateral leg swelling or pain.
• Aortic risks: known aneurysm, bicuspid aortic valve, Marfan syndrome or another heritable aortopathy, recent aortic manipulation, severe hypertension, cocaine/amphetamine exposure, and family history of dissection or sudden unexplained death.
• Recent viral illness, fever, vaccination timing when clinically relevant, or new exercise intolerance that may suggest myocarditis or pericarditis.
• Medication review: antiplatelets, anticoagulants, beta-blockers, rate-limiting calcium-channel blockers, phosphodiesterase-5 inhibitors, stimulants, cocaine/amphetamines, insulin or sulfonylureas, and medications that may cause pill esophagitis. Clarify allergies, bleeding history, and prior contrast reactions.

Focused examination

Repeat vital signs rather than relying on one triage set. Include temperature, heart rate, respiratory rate, blood pressure, oxygen saturation, pain score, and mental status. Consider blood pressure in both arms when acute aortic syndrome is a meaningful possibility, recognizing that a normal inter-arm comparison does not exclude dissection.[5]

The examination should include general appearance; skin perfusion and diaphoresis; cardiac rate/rhythm and murmurs; lung sounds and work of breathing; chest-wall tenderness; abdomen and epigastrium; peripheral pulses; lower-extremity edema/asymmetry; and a focused neurologic assessment when indicated. Look for signs of heart failure, including jugular venous distention, pulmonary crackles, new edema, or an S3. A new diastolic murmur, pulse deficit, focal neurologic deficit, or limb ischemia increases concern for acute aortic syndrome.

Reproducible pain with chest-wall palpation supports a musculoskeletal source but should be interpreted cautiously. Patients may have musculoskeletal tenderness and ACS simultaneously, particularly after exertion, coughing, falls, or prolonged positioning.

Differential diagnosis

Must-not-miss diagnoses

• ACS, including ST-elevation myocardial infarction, non-ST-elevation myocardial infarction, and unstable angina.
• Acute aortic syndrome: dissection, intramural hematoma, or penetrating aortic ulcer.
• PE.
• Tension pneumothorax, spontaneous pneumothorax, severe pneumonia, or acute severe asthma/chronic obstructive pulmonary disease exacerbation.
• Pericarditis with tamponade physiology; myocarditis.
• Acute decompensated heart failure and malignant arrhythmia.
• Esophageal rupture, upper gastrointestinal bleeding with demand ischemia, or severe pancreatobiliary disease when clinically plausible.

Common nonemergent diagnoses after appropriate exclusion of dangerous causes

• Chest-wall strain, costochondritis, rib injury, cervical/thoracic radiculopathy, or myofascial pain.
• Gastroesophageal reflux disease, esophagitis, dyspepsia, or esophageal spasm.
• Viral respiratory illness, bronchitis, pleurisy, or uncomplicated pneumonia.
• Panic symptoms or anxiety. This should remain a diagnosis of exclusion when symptoms are new, severe, exertional, or accompanied by concerning physiologic findings.

Diagnostic approach in urgent care

Electrocardiography

Obtain a 12-lead ECG promptly for acute chest pain, chest pressure, exertional dyspnea, suspected anginal equivalents, syncope with possible cardiac cause, or concerning palpitations. Compare with prior ECGs whenever available. A normal ECG does not exclude ACS, particularly early after symptom onset or with intermittent ischemia. Repeat ECGs are appropriate when symptoms persist, recur, evolve, or clinical suspicion remains high.[1,2]

ECG findings that should prompt emergency transfer include ST-segment elevation or depression, dynamic changes, posterior infarction patterns, ischemic T-wave abnormalities in an appropriate syndrome, new significant conduction abnormalities, or dangerous dysrhythmias. If the machine interpretation and clinician interpretation differ, prioritize expert over-read and the clinical picture; automated ECG interpretation is not sufficiently reliable to rule out ischemia.

Troponin testing

High-sensitivity cardiac troponin (hs-cTn) is the preferred biomarker for myocardial injury, but safe interpretation requires an assay-specific, validated clinical decision pathway with defined timing, delta criteria, quality controls, and reliable follow-up capability.[1,2] A single negative troponin should not be used to rule out MI in patients with concerning symptoms, early presentation, an abnormal ECG, or elevated baseline risk unless the patient meets all criteria of the specific validated pathway used by the institution.

Urgent care settings should not create ad hoc “rule-out” protocols using non-high-sensitivity troponin, unvalidated point-of-care troponin assays, or isolated reference-range values. Troponin elevation indicates myocardial injury, not necessarily type 1 MI; renal dysfunction, heart failure, tachyarrhythmia, PE, myocarditis, sepsis, and other conditions may elevate troponin. Any unexplained acute elevation or clinically significant delta generally warrants ED assessment.

Chest radiography and point-of-care ultrasound

Chest radiography may identify pneumothorax, infiltrate, edema, pleural effusion, fracture, or mediastinal abnormalities, but a normal film does not exclude PE, ACS, or acute aortic syndrome. Chest radiography should not delay EMS transfer when a life-threatening diagnosis is suspected.

Point-of-care ultrasound can support recognition of pleural sliding absence, B-lines, pericardial effusion, gross left-ventricular dysfunction, right-heart strain, or proximal deep venous thrombosis when performed by clinicians with training and quality assurance. However, it is operator-dependent and should not be used as a stand-alone test to exclude PE, tamponade, ACS, or aortic dissection. A concerning ultrasound finding should accelerate transfer; a nondiagnostic or normal study should not reassure clinicians away from transfer when pretest probability is meaningful.

D-dimer and PE assessment

Use a validated pretest-probability assessment before ordering D-dimer testing. D-dimer is most useful in patients with low or, depending on the assay and pathway, intermediate probability of PE. It should not be used to rule out PE in a patient with high clinical probability, instability, or a presentation that warrants immediate imaging and ED treatment. D-dimer values rise with age, pregnancy, cancer, inflammation, infection, hospitalization, and many other conditions; a positive result is nonspecific.[4]

Age-adjusted D-dimer thresholds may be used only with the validated assay and institutional protocol. Point-of-care D-dimer assays may have lower sensitivity than central laboratory testing and should be restricted to carefully selected low-risk patients if used at all.[4] Most urgent care settings should transfer patients with suspected PE who cannot be confidently excluded using a validated pathway available at that site.

Red flags by diagnosis

ACS

• Pressure, heaviness, squeezing, or discomfort with exertion or at rest; new or worsening symptoms; associated diaphoresis, nausea, dyspnea, or syncope.
• Known coronary disease, diabetes, chronic kidney disease, older age, or multiple atherosclerotic risk factors.
• Abnormal or evolving ECG, hypotension, heart failure signs, or arrhythmia.

Acute aortic syndrome

• Abrupt severe chest, back, abdominal, or migratory pain, often maximal at onset.
• Neurologic symptoms, syncope, pulse deficit, limb ischemia, new aortic regurgitation murmur, shock, or a known aortic aneurysm/heritable aortopathy.
• Do not rely on “tearing” pain as a required descriptor. The condition may present with sharp or stabbing pain, dyspnea, neurologic deficits, or painless malperfusion.[5]

PE

• Pleuritic chest pain, unexplained dyspnea, tachycardia, hypoxemia, syncope, hemoptysis, unilateral leg swelling, or VTE risk factors.
• Pregnancy or the postpartum period, active cancer, estrogen exposure, recent surgery, trauma, or immobilization.

Pneumothorax, tamponade, and esophageal rupture

• Sudden unilateral pleuritic pain with dyspnea or asymmetric breath sounds.
• Hypotension, distended neck veins, muffled heart sounds, or rapidly worsening dyspnea suggesting tamponade physiology.
• Severe chest pain after forceful vomiting, retching, or esophageal instrumentation, particularly with fever, subcutaneous emphysema, or systemic toxicity.

Management while arranging emergency transfer

Place the patient at rest, establish appropriate monitoring, obtain serial vital signs, repeat ECGs for recurrent or persistent ischemic symptoms, and follow local emergency response procedures. Provide supplemental oxygen only when clinically indicated, such as hypoxemia, respiratory distress, or shock; routine oxygen for normoxemic suspected ACS is not beneficial.

If ACS is suspected and there is no aspirin allergy, active significant bleeding, known bleeding disorder, or strong concern for acute aortic syndrome, a common adult prehospital/acute-care approach is chewable aspirin 162 to 325 mg by mouth once while transfer is being arranged.[3] Confirm whether the patient has already taken aspirin and follow local protocol. Aspirin is not a benign default treatment: avoid or obtain emergency medical direction when there is suspected aortic dissection, active gastrointestinal bleeding, severe aspirin hypersensitivity, or another major contraindication. Pediatric use for undifferentiated chest pain is not routine and should be directed by pediatric emergency or cardiology consultation.

Patients with a prescribed nitroglycerin supply may take it only according to their established plan and local protocol. Nitroglycerin should not be used as a diagnostic test for ACS. Avoid it in hypotension, suspected right-ventricular infarction or preload-dependent states, suspected severe aortic stenosis when clinically relevant, and recent phosphodiesterase-5 inhibitor use because severe hypotension can occur. For commercially available sublingual nitroglycerin tablets, labeled adult use commonly permits one 0.3 mg, 0.4 mg, or 0.6 mg tablet sublingually every 5 minutes as needed, with no more than three tablets in 15 minutes; urgent care clinicians should independently verify the exact product labeling, contraindications, and local EMS/medical-direction protocol before use.[7]

Do not initiate empiric anticoagulation, fibrinolysis, dual antiplatelet therapy, beta-blockade, or intravenous antihypertensive treatment for undifferentiated chest pain in routine urgent care unless the clinic has explicit protocols, appropriate monitoring, immediate physician support, and transfer coordination. These treatments can be harmful in aortic dissection, bleeding, bradycardia, acute heart failure, or other alternative diagnoses.

Special populations

Pregnancy and postpartum patients

Pregnancy does not protect against ACS, PE, aortic dissection, cardiomyopathy, or spontaneous coronary artery dissection. Consider PE, hypertensive disorders, peripartum cardiomyopathy, and aortic disease early in pregnant or postpartum patients with chest pain, dyspnea, syncope, or leg symptoms. D-dimer interpretation and imaging selection require pregnancy-specific pathways; do not apply standard nonpregnant algorithms uncritically. Urgent ED or obstetric-capable evaluation is appropriate when a serious diagnosis is possible.

Pediatric and adolescent patients

Ischemic coronary disease is uncommon in children, but myocarditis, pericarditis, congenital coronary anomalies, hypertrophic cardiomyopathy, dysrhythmia, pneumothorax, pneumonia, asthma, trauma, sickle-cell complications, and stimulant-associated events may present with chest pain. Exertional pain, exertional syncope, palpitations, abnormal cardiac examination, abnormal ECG, fever with tachycardia out of proportion, known heart disease, or a family history of sudden death warrants ED transfer or urgent pediatric specialty input. Medication doses in children must be weight-based with maximum-dose limits independently verified.

Older adults and patients with renal or hepatic impairment

Older adults may present with dyspnea, weakness, syncope, confusion, nausea, or fatigue rather than prominent pain. Chronic kidney disease increases baseline cardiovascular risk and complicates troponin interpretation because chronic myocardial injury may be present; serial values and clinical context are essential. Renal dysfunction also affects contrast imaging decisions and dosing of many anticoagulants, analgesics, and other medications. Hepatic impairment, thrombocytopenia, anticoagulant use, and alcohol-related disease increase bleeding risk. These factors should lower the threshold for ED evaluation rather than encourage abbreviated outpatient testing.

Disposition and follow-up

Emergency transfer

Transfer any patient with instability, concerning symptoms, abnormal ECG, elevated or indeterminate troponin, suspected PE/aortic syndrome/pneumothorax/tamponade, inability to complete a validated diagnostic pathway, or unreliable follow-up. Intermediate-risk patients identified through validated ED pathways often need observation, serial hs-cTn testing, and selective noninvasive cardiac testing that exceed usual urgent care capabilities.[2]

Outpatient management may be reasonable only when all of the following are true

• A dangerous diagnosis is clinically unlikely after an appropriate history, examination, and available testing.
• Symptoms are consistent with a nonemergent condition, are improving or stable, and there are no red flags.
• ECG is reassuring when indicated, and any troponin strategy used conforms to a validated assay-specific protocol.
• The patient has stable vital signs, intact decision-making capacity, safe transportation, and reliable access to follow-up.
• The clinician documents why outpatient care is reasonable and gives explicit return precautions.

For clearly musculoskeletal pain, conservative nonpharmacologic care may include activity modification, local heat or ice, and follow-up. Analgesic selection should be individualized. Nonsteroidal anti-inflammatory drugs can worsen renal function, fluid retention, blood pressure, gastrointestinal bleeding risk, and anticoagulant-related bleeding; they should be avoided or used cautiously in patients with renal disease, heart failure, peptic ulcer disease, anticoagulant therapy, pregnancy considerations, or suspected ischemic disease. Verify dosing, interactions, pregnancy status, renal/hepatic function, and current labeling before prescribing any medication.

Return and emergency precautions

Patients discharged from urgent care with a presumed nonemergent cause should be instructed to seek emergency care immediately for recurrent, worsening, persistent, or exertional chest discomfort; dyspnea; syncope; palpitations with dizziness; diaphoresis; vomiting; hemoptysis; new neurologic symptoms; fever with clinical worsening; unilateral leg swelling; or any new concern. Arrange follow-up based on the working diagnosis and risk profile, often within several days for unresolved symptoms or cardiovascular risk assessment.

Documentation considerations

• Time of symptom onset; symptom trajectory; relevant risk factors; associated symptoms; and pertinent negatives.
• Initial and serial vital signs, appearance, focused examination findings, and reassessments.
• ECG acquisition time, clinician interpretation, comparison with prior ECG when available, and reason for repeat ECGs or transfer.
• Troponin assay type, collection times, result interpretation according to the institutional pathway, and limitations of testing if applicable.
• Pretest-probability reasoning for PE or acute aortic syndrome and why testing, transfer, or outpatient care was selected.
• Medications administered or withheld, including contraindication screening and response.
• Transfer method, receiving facility, clinician-to-clinician handoff, EMS activation time, and patient status at departure.
• For discharge: diagnostic uncertainty, shared decision-making when applicable, follow-up plan, and specific written emergency precautions.

Clinical takeaways

• In urgent care, chest pain evaluation is primarily a triage and risk-stratification task. Identify life-threatening disease early and transfer when the setting cannot safely complete evaluation.
• Obtain and interpret an ECG promptly; repeat it when symptoms or concern persist. A single normal ECG does not rule out ACS.
• Use hs-cTn only within a validated, assay-specific clinical decision pathway. Do not improvise a rule-out strategy with isolated testing.
• Apply PE and aortic-dissection risk assessment before relying on D-dimer, chest radiography, symptom descriptors, or a reassuring examination.
• Older adults, pregnant/postpartum patients, patients with chronic kidney disease, and patients with known cardiovascular disease may have atypical presentations and deserve a lower threshold for ED transfer.
• When uncertainty remains, the safer disposition for potentially serious chest pain is monitored EMS transfer, not outpatient reassurance.

References

1. Gulati M, Levy PD, Mukherjee D, Amsterdam E, Bhatt DL, Birtcher KK, et al. 2021 AHA/ACC/ASE/CHEST/SAEM/SCCT/SCMR guideline for the evaluation and diagnosis of chest pain: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. 2021;144(22):e368-e454. doi:10.1161/CIR.0000000000001029.
2. Kontos MC, de Lemos JA, Deitelzweig SB, Diercks DB, Gore MO, Hess EP, et al. 2022 ACC expert consensus decision pathway on the evaluation and disposition of acute chest pain in the emergency department: a report of the American College of Cardiology Solution Set Oversight Committee. J Am Coll Cardiol. 2022;80(20):1920-1930. doi:10.1016/j.jacc.2022.08.750.
3. Rao SV, O’Donoghue ML, Ruel M, Rab T, Tamis-Holland JE, Alexander JH, et al. 2025 ACC/AHA/ACEP/NAEMSP/SCAI guideline for the management of patients with acute coronary syndromes: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. J Am Coll Cardiol. 2025;85(22):2135-2237. doi:10.1016/j.jacc.2024.11.009.
4. Konstantinides SV, Meyer G, Becattini C, Bueno H, Geersing GJ, Harjola VP, et al. 2019 ESC guidelines for the diagnosis and management of acute pulmonary embolism developed in collaboration with the European Respiratory Society. Eur Heart J. 2020;41(4):543-603. doi:10.1093/eurheartj/ehz405.
5. Isselbacher EM, Preventza O, Hamilton Black J 3rd, Augoustides JGT, Beck AW, Bolen MA, et al. 2022 ACC/AHA guideline for the diagnosis and management of aortic disease: a report of the American Heart Association/American College of Cardiology Joint Committee on Clinical Practice Guidelines. Circulation. 2022;146(24):e334-e482. doi:10.1161/CIR.0000000000001106.
6. Tomaszewski CA, Nestler D, Shah KH, Sudhir A, Brown MD, Shih RD, et al. Clinical policy: critical issues in the evaluation and management of emergency department patients with suspected non-ST-elevation acute coronary syndromes. Ann Emerg Med. 2018;72(5):e65-e106. doi:10.1016/j.annemergmed.2018.07.045.
7. National Library of Medicine. Nitroglycerin sublingual tablet: prescribing information. DailyMed [Internet]. Bethesda (MD): National Library of Medicine; cited 2026 Aug 15.

Educational disclaimer: This article is intended for clinician education and does not replace patient-specific clinical judgment, emergency consultation, local protocols, product labeling, or current guidelines. Medication dosing, contraindications, interactions, pregnancy considerations, and renal/hepatic adjustments must be independently verified before clinical use.

Hypertensive urgency vs hypertensive emergency is a high-stakes distinction in urgent care. The absolute blood pressure (BP) number matters, but the immediate question is whether severe BP elevation is accompanied by acute hypertension-mediated target-organ injury. This distinction determines whether the patient needs emergency transport and monitored parenteral treatment or can be managed with careful outpatient treatment and reliable follow-up.

Contemporary American guidance increasingly favors the term severe hypertension rather than hypertensive urgency for nonpregnant adults with BP >180/120 mm Hg but no acute target-organ injury. The older term remains common in clinical documentation and patient-facing discussions, so clinicians should recognize both terms while documenting the more precise clinical finding: severe BP elevation without evidence of acute organ injury.^1,2

Clinical overview

Hypertensive emergency is severe BP elevation with new or worsening acute injury involving the brain, heart, aorta, kidneys, retina, or pregnancy-related maternal-fetal system. It is a time-sensitive emergency requiring emergency department (ED) transfer, continuous monitoring, and usually titratable parenteral antihypertensive therapy in a monitored setting.

Severe asymptomatic hypertension (historically called hypertensive urgency) is markedly elevated BP, often >180/120 mm Hg, without symptoms or findings attributable to acute target-organ injury. These patients generally do not benefit from rapid BP normalization in urgent care or from reflexive intravenous therapy. They need confirmation of the reading, assessment for reversible contributors and occult organ injury, medication reconciliation, initiation/reinstitution/intensification of appropriate oral long-term therapy when clinically appropriate, and timely follow-up.^1-3

BP thresholds are useful screening triggers, not diagnostic cutoffs. A patient with chronic poorly controlled hypertension may have BP 220/120 mm Hg without acute injury, whereas a patient with a lower BP may have an emergency if the BP has risen rapidly from baseline or if pregnancy-associated severe hypertension is present. Clinical context and organ injury—not the number alone—define the emergency.

Clinical significance and pathophysiology

Marked BP elevation may represent chronic uncontrolled hypertension, transient sympathetic activation, or a rapid rise that exceeds vascular autoregulation. When autoregulatory mechanisms fail, endothelial injury, arteriolar damage, ischemia, edema, hemorrhage, and microvascular thrombosis can occur. The affected organ and clinical syndrome guide BP targets and treatment intensity.

Rapid, indiscriminate BP reduction can be harmful. Patients with longstanding hypertension may have a right-shifted autoregulatory curve; abrupt reduction can reduce cerebral, coronary, or renal perfusion. Therefore, suspected hypertensive emergencies require syndrome-specific, monitored reduction rather than a universal urgent-care target. In most non-aortic, nonpregnancy, nonstroke emergencies, initial reduction is controlled rather than immediate normalization.^1,3

Etiology and risk factors

• Known hypertension with medication nonadherence, interrupted access, inadequate regimen, or recent discontinuation.
• Pain, anxiety, panic, acute illness, urinary retention, hypoxemia, alcohol withdrawal, or sleep deprivation.
• Prescription, nonprescription, and substance contributors: nonsteroidal anti-inflammatory drugs, systemic corticosteroids, sympathomimetic decongestants, stimulants, estrogen-containing therapy, calcineurin inhibitors, erythropoiesis-stimulating agents, cocaine, methamphetamine, excess caffeine, nicotine, alcohol, and certain herbal products.
• Renal disease, renovascular disease, primary aldosteronism, obstructive sleep apnea, thyroid disease, pheochromocytoma/paraganglioma, Cushing syndrome, and other secondary causes.
• Pregnancy or the postpartum period, including preeclampsia and eclampsia.

Do not assume that anxiety explains a markedly elevated BP before assessing for emergency features. Anxiety and pain can elevate BP, but they may also occur during acute coronary syndrome, aortic dissection, intracranial hemorrhage, pulmonary edema, or preeclampsia.

Typical presentation

Patients with severe asymptomatic hypertension may feel entirely well or report nonspecific symptoms such as mild headache, anxiety, palpitations, dizziness, or epistaxis. These findings alone do not establish hypertensive emergency. Conversely, the absence of symptoms does not replace an appropriate focused examination.

Symptoms concerning for acute target-organ injury include:

• Focal neurologic deficit, confusion, altered mental status, seizure, syncope, severe abrupt headache, visual loss, or persistent vomiting.
• Chest pain, chest pressure, dyspnea, orthopnea, hypoxemia, diaphoresis, or signs of acute pulmonary edema.
• Sudden severe chest, back, abdominal, or tearing pain; pulse deficit; new focal ischemia; or unequal extremity BP.
• Oliguria, gross hematuria, rapidly worsening edema, or symptoms suggesting acute kidney injury.
• Pregnancy or postpartum headache, visual symptoms, right upper-quadrant/epigastric pain, dyspnea, edema with systemic symptoms, seizure, or decreased fetal movement.

Focused history

Obtain a concise but deliberate history while repeating the BP correctly. Clarify:

• Time of onset, peak symptoms, baseline BP, and whether the elevation is new or chronic.
• Neurologic, visual, cardiopulmonary, renal, and aortic-dissection symptoms.
• Known hypertension, cardiovascular disease, chronic kidney disease, cerebrovascular disease, diabetes, and prior hypertensive emergency.
• Current medication list, recent missed doses, affordability/access barriers, adverse effects, allergies, and prior medication intolerance.
• Use of over-the-counter products, supplements, recreational drugs, stimulants, alcohol, and nicotine.
• Pregnancy possibility, gestational age, postpartum status, obstetric history, and fetal concerns. Ask explicitly because severe postpartum hypertension may occur after hospital discharge.
• For children and adolescents: prior BP values, renal/urologic history, coarctation history, endocrine symptoms, medication or stimulant exposure, and family history.

Focused examination and accurate BP measurement

First, verify the measurement. Use a validated, recently maintained device and an appropriately sized cuff. Seat the patient with back supported, feet flat, legs uncrossed, and arm supported at heart level; allow quiet rest when feasible. Avoid measurement over clothing. Repeat manually when the reading is unexpected, extremely high, or inconsistent with the clinical picture. Record the arm, cuff size, patient position, and repeated values. Improper cuff size, movement, pain, conversation, and acute distress can falsely elevate readings.²

Perform a targeted examination:

• General: appearance, distress, diaphoresis, mental status, respiratory effort, and oxygen saturation.
• Neurologic: level of consciousness, speech, cranial nerves, visual fields when feasible, motor asymmetry, sensation, gait if safe, and cerebellar findings.
• Cardiopulmonary: rhythm, murmurs, gallop, jugular venous distention, crackles, peripheral edema, and signs of hypoperfusion.
• Vascular: bilateral upper-extremity pulses and BP when dissection is suspected; assess for pulse asymmetry, limb ischemia, or neurologic deficits.
• Funduscopic examination: if skill and equipment are available, assess for papilledema, retinal hemorrhages, or exudates. A normal limited funduscopic examination does not exclude emergency.
• Pregnancy-specific: reflexes/clonus when appropriate, edema context, pulmonary findings, abdominal/right upper-quadrant tenderness, and fetal assessment according to setting capability.

Must-not-miss diagnoses and red flags

Urgent care should prioritize detection of conditions requiring emergency transfer rather than attempting to complete an exhaustive hypertension workup. Treat the following as potential hypertensive emergencies or alternative time-critical diagnoses:

• Acute ischemic stroke, intracerebral hemorrhage, subarachnoid hemorrhage, hypertensive encephalopathy, or posterior reversible encephalopathy syndrome.
• Acute coronary syndrome, acute left ventricular failure, pulmonary edema, or malignant arrhythmia.
• Acute aortic syndrome.
• Acute kidney injury with concerning clinical features or markedly abnormal renal function compared with baseline.
• Acute retinal injury with visual symptoms or papilledema.
• Preeclampsia with severe features, eclampsia, or acute severe hypertension during pregnancy or postpartum.
• Sympathomimetic toxicity, cocaine/methamphetamine-associated cardiovascular toxicity, alcohol withdrawal, thyroid storm, or catecholamine crisis.

Diagnostic approach in urgent care

The diagnostic workup should be symptom-directed and should not delay transfer when emergency features are present. A normal urgent-care test result does not reliably exclude time-sensitive neurologic, cardiac, vascular, or obstetric disease.

When no emergency features are present

For a clinically stable, nonpregnant adult with confirmed severe BP elevation and no symptoms or examination findings of acute injury, extensive immediate testing is not routinely necessary solely to lower BP. Consider targeted testing when it will change disposition or safely inform outpatient therapy—for example, serum creatinine/electrolytes before selecting or adjusting certain chronic medications, urinalysis for renal concerns, pregnancy testing when relevant, or ECG for concerning but nondiagnostic symptoms. The 2025 guideline supports outpatient evaluation and timely oral treatment for nonpregnant adults with BP >180/120 mm Hg without acute target-organ damage.¹

When emergency is suspected

Activate EMS or arrange immediate ED transfer. Obtain only tests that can be completed without delaying transport and are within the clinic’s capabilities, such as point-of-care glucose, ECG, pulse oximetry, or urine pregnancy testing. An ECG may identify ischemia, arrhythmia, or left ventricular hypertrophy but cannot exclude acute coronary syndrome. Point-of-care creatinine and urinalysis can support renal assessment but cannot exclude all acute injury. Neuroimaging, serial cardiac biomarkers, advanced aortic imaging, continuous monitoring, and specialty obstetric assessment are generally beyond routine urgent-care capability.

Management

Hypertensive emergency: transfer, monitor, and do not delay definitive care

For suspected hypertensive emergency, place the patient in a monitored area if available, obtain vital signs including oxygen saturation, establish a safe transfer plan, and use EMS when there are neurologic, cardiopulmonary, aortic, pregnancy-related, altered-mental-status, or instability concerns. Provide supplemental oxygen only for hypoxemia or respiratory distress. Maintain a calm environment and avoid unnecessary exertion.

Do not attempt routine urgent-care BP normalization. Do not send a patient with possible stroke, acute coronary syndrome, pulmonary edema, aortic syndrome, encephalopathy, seizure, or pregnancy-related severe hypertension home to take oral medication and “recheck later.” Similarly, do not delay EMS transfer to observe a medication response. Definitive therapy requires condition-specific targets, titratable agents, serial reassessment, and monitoring for hypoperfusion and deterioration.^1,3

In most nonpregnant, nonstroke hypertensive emergencies, initial BP reduction is generally limited to no more than about 25% in the first hour, followed by gradual reduction if clinically stable. Important exceptions include acute aortic syndrome and pregnancy-associated severe hypertension; acute ischemic and hemorrhagic stroke also require condition-specific BP strategies. These targets are ED/ICU management principles, not a directive to treat such emergencies in a routine urgent-care clinic.^1,3

Severe asymptomatic hypertension: outpatient-oriented management

For a stable nonpregnant adult without acute target-organ injury:

1. Confirm BP with correct technique and repeat measurement after rest when feasible.
2. Address reversible contributors such as pain, urinary retention, missed chronic medications, medication/substance effects, and acute illness.
3. Perform medication reconciliation. Determine whether the patient has stopped therapy, cannot afford it, is taking an interacting agent, or is experiencing adverse effects.
4. Initiate, reinstitute, or intensify a chronic oral antihypertensive regimen when appropriate for the individual patient and within the clinician’s scope, based on comorbidities, prior regimen, laboratory status, pregnancy potential, allergies, and ability to obtain follow-up.
5. Do not use short-acting oral medication simply to force a rapid BP decrease before discharge. Avoid as-needed antihypertensive dosing intended only to improve a single clinic measurement.
6. Arrange close follow-up, ideally within several days and no later than one week when BP is markedly elevated or therapy has changed. Earlier reassessment is appropriate for very high readings, unreliable follow-up, kidney disease, frailty, medication changes requiring laboratory monitoring, or significant social barriers.

Evidence and recommendations vary regarding exactly when an urgent-care clinician should start a new long-term medication versus arrange rapid primary-care follow-up. A practical approach is individualized: patients with reliable near-term follow-up may be referred with a documented plan, whereas initiating or restarting therapy may be reasonable when access barriers make follow-up uncertain. In either scenario, avoid overly rapid reduction and create a clear safety net.^1-3

Medication considerations and precautions

Medication selection for chronic outpatient control is individualized and should not be based solely on a single urgent-care BP. Confirm the current product, dose, adherence history, renal function when relevant, potassium status when relevant, pregnancy status, allergies, interacting medications, and prior adverse reactions before prescribing or changing therapy.

• Pregnancy potential: Angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, direct renin inhibitors, mineralocorticoid receptor antagonists, and atenolol should not be used during pregnancy because of fetal risk. Obtain pregnancy information before initiating or escalating therapy in patients who could be pregnant.¹
• Kidney disease: Avoid reflexive medication escalation without considering acute kidney injury, volume depletion, hyperkalemia risk, and the need for prompt laboratory follow-up.
• Older adults: Assess for orthostatic symptoms, falls, frailty, polypharmacy, cognitive barriers, and potential harms from excessive BP reduction. A high seated BP does not justify causing hypotension.
• Hepatic impairment: Medication metabolism and exposure may be altered; verify product labeling and select therapy cautiously.
• Drug interactions: Review NSAIDs, decongestants, stimulants, corticosteroids, oral contraceptives, calcineurin inhibitors, lithium, and other agents that may elevate BP or interact with chronic therapy.
• Medication doses: This article intentionally does not provide a universal urgent-care dosing regimen because no single agent, dose, frequency, or duration is appropriate for every patient with severe hypertension. Clinicians must independently verify current product labeling, renal/hepatic adjustments, contraindications, interactions, and local protocols before clinical use.

Pregnancy and postpartum considerations

Pregnancy and the postpartum period require a lower threshold for emergency evaluation. Acute severe hypertension in pregnancy or postpartum—systolic BP of at least 160 mm Hg or diastolic BP of at least 110 mm Hg that persists for 15 minutes or more—is an obstetric emergency requiring urgent treatment to reduce maternal stroke risk. Preeclampsia can occur postpartum, including after a previously uncomplicated pregnancy. Transfer patients with severe-range BP, concerning symptoms, or possible preeclampsia/eclampsia to an obstetric-capable ED or labor-and-delivery setting; do not delay transfer for serial outpatient observation.⁴

Headache, visual disturbance, dyspnea, chest pain, upper abdominal pain, seizure, confusion, or reduced fetal movement in a pregnant or postpartum patient should heighten concern even when BP is not persistently severe range. Urgent care should not independently manage suspected eclampsia or pregnancy-related hypertensive emergency unless the facility has the trained staff, medications, equipment, transfer process, and obstetric emergency protocols required for immediate stabilization.

Pediatric considerations

Do not apply adult thresholds or adult medication regimens to children. Pediatric BP interpretation is age-, sex-, and height-dependent for most children, while adolescents aged 13 years or older use adult-style classification thresholds. Severe hypertension in a child may reflect renal, renovascular, endocrine, neurologic, cardiac, or medication-related disease and should prompt careful assessment and low threshold for pediatric ED consultation or transfer, particularly with symptoms, abnormal examination, or substantially elevated BP on repeat measurement.⁵

Any pediatric medication treatment requires a pediatric-specific indication, weight-based dosing, maximum-dose verification, formulation review, and pediatric renal/hepatic considerations. Routine urgent care should not attempt acute BP reduction in a child with suspected hypertensive emergency.

Disposition

Send by EMS or arrange immediate ED transfer

• Any suspected acute target-organ injury or unstable vital signs.
• New focal neurologic deficit, seizure, altered mental status, syncope with concern for cardiac/neurologic cause, severe sudden headache, or acute visual loss.
• Chest pain, dyspnea, hypoxemia, pulmonary edema, suspected acute coronary syndrome, or new heart failure.
• Suspected acute aortic syndrome or severe abrupt chest/back/abdominal pain.
• Pregnancy or postpartum severe-range hypertension, or pregnancy/postpartum symptoms concerning for preeclampsia/eclampsia.
• Acute kidney injury concern, oliguria, severe electrolyte abnormality, or inability to safely evaluate concerning symptoms in clinic.
• Inability to ensure safe outpatient monitoring because of cognitive impairment, unreliable follow-up, lack of transportation, or major social barriers in the setting of concerning clinical uncertainty.

Outpatient disposition may be appropriate

Outpatient care may be reasonable for a nonpregnant, clinically stable adult with confirmed severe BP elevation, no symptoms or signs of acute organ injury, an adequate focused evaluation, a documented medication/follow-up plan, and clear return precautions. The discharge decision should be based on the entire clinical picture, not a requirement that BP reach a particular number before leaving urgent care.

Follow-up, counseling, and return precautions

Counsel patients that long-term BP control—not abrupt single-visit normalization—reduces cardiovascular and kidney risk. Encourage home BP monitoring with a validated upper-arm cuff, proper technique, and a written log. Review medication adherence, sodium reduction, alcohol reduction or cessation when indicated, tobacco cessation, sleep, physical activity, and medication affordability. Lifestyle counseling should complement—not replace—timely pharmacologic management when indicated.¹

Provide explicit emergency precautions: seek emergency care immediately for chest pain, shortness of breath, fainting, new weakness or numbness, trouble speaking, confusion, seizure, severe or sudden headache, vision change/loss, severe back or abdominal pain, markedly reduced urine output, or pregnancy/postpartum headache, vision changes, upper abdominal pain, dyspnea, or seizure.

Documentation considerations

• All BP values, timing, arm, position, cuff size, device/manual confirmation, and repeat measurements.
• Focused symptoms denied and symptoms present, including neurologic, cardiopulmonary, aortic, renal, and pregnancy-related review.
• Focused examination findings, including mental status, neurologic examination, cardiopulmonary status, oxygen saturation, and relevant vascular findings.
• Clinical rationale for emergency transfer versus outpatient management.
• Medication reconciliation, missed doses, potential contributing substances/medications, allergies, pregnancy assessment, and relevant comorbidities.
• Tests performed, interpretation, limitations, consultant/receiving-facility communication, transport method, and transfer time when applicable.
• Follow-up appointment plan, counseling, and specific return/emergency precautions.

Clinical takeaways

• BP alone does not define hypertensive emergency. Look for acute target-organ injury.
• Severe asymptomatic hypertension is usually an outpatient problem, not an IV-medication problem. Confirm the reading, identify contributors, address chronic treatment, and ensure follow-up.
• Hypertensive emergency requires transfer. Do not delay transport to achieve a clinic BP target.
• Pregnancy and postpartum severe hypertension are emergencies at lower BP thresholds.
• Rapid BP reduction can cause harm. Avoid reflexive treatment aimed at normalizing a single measurement.
• Clear documentation and safety-netting are central to safe urgent-care practice.

References

1. Jones DW, Ferdinand KC, Taler SJ, Johnson HM, Shimbo D, Abdalla M, et al. 2025 AHA/ACC/AANP/AAPA/ABC/ACCP/ACPM/AGS/AMA/ASPC/NMA/PCNA/SGIM Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Hypertension. 2025;82(10):e212-e316. doi:10.1161/HYP.0000000000000249.
2. Bress AP, Anderson TS, Flack JM, Ghazi L, Hall ME, Laffer CL, et al. The management of elevated blood pressure in the acute care setting: a scientific statement from the American Heart Association. Hypertension. 2024;81(8):e94-e106. doi:10.1161/HYP.0000000000000238.
3. Miller JB, Hrabec D, Krishnamoorthy V, Kinni H, Brook RD. Evaluation and management of hypertensive emergency. BMJ. 2024;386:e077205. doi:10.1136/bmj-2023-077205.
4. American College of Obstetricians and Gynecologists. ACOG Committee Opinion No. 767: Emergent therapy for acute-onset, severe hypertension during pregnancy and the postpartum period. Obstet Gynecol. 2019;133(2):e174-e180. doi:10.1097/AOG.0000000000003075.
5. Flynn JT, Kaelber DC, Baker-Smith CM, Blowey D, Carroll AE, Daniels SR, et al. Clinical practice guideline for screening and management of high blood pressure in children and adolescents. Pediatrics. 2017;140(3):e20171904. doi:10.1542/peds.2017-1904.

Educational disclaimer: This article is intended for clinician education and does not replace individualized clinical judgment, local emergency-transfer procedures, medication labeling, specialist consultation, or current institutional and professional guidelines. Independently verify all medication dosing, contraindications, interactions, renal/hepatic adjustments, pregnancy considerations, and current recommendations before clinical use.

Cardiovascular complaints are among the highest-risk presentations encountered in urgent care. A patient may walk in with “indigestion,” a fluttering sensation, mild dizziness, an elevated blood-pressure reading, or unilateral leg swelling and still have a time-sensitive disease that cannot be safely excluded with the resources of a typical outpatient clinic.

The urgent-care clinician’s task is therefore not to prove that every symptom is cardiac. It is to answer four questions:

1. Is the patient unstable or experiencing a time-sensitive emergency?
2. Which dangerous cardiovascular and cardiopulmonary conditions remain plausible?
3. Can available testing meaningfully lower risk, or does the patient require serial testing, imaging, observation, or consultation elsewhere?
4. If outpatient management is reasonable, what follow-up and return precautions make that plan safe?

The 2021 multisociety chest-pain guideline recommends describing symptoms as cardiac, possibly cardiac, or noncardiac, rather than using the older terms “typical” and “atypical.” It also emphasizes that ischemic symptoms may be described as pressure, tightness, squeezing, heaviness, or burning and may occur in the arm, shoulder, neck, jaw, back, or upper abdomen rather than only in the chest.[1]

Scope of This Cornerstone Guide

This article provides a symptom-first framework for adults presenting with:

• Chest discomfort or pressure
• Palpitations or an abnormal pulse
• Presyncope or syncope
• Elevated or low blood pressure
• Dyspnea possibly related to cardiovascular disease
• Unilateral or bilateral extremity edema
• Incidental ECG abnormalities

It is not a substitute for advanced cardiac life-support protocols, emergency medical services, serial high-sensitivity troponin pathways, definitive imaging, specialist consultation, or patient-specific clinical judgment.

First Decision: Is the Patient Stable Enough to Remain in Urgent Care?

Begin with appearance and physiology before pursuing a detailed differential diagnosis.

Immediate assessment

• Airway patency and ability to speak
• Respiratory rate, work of breathing, and oxygen saturation
• Heart rate, rhythm regularity, and pulse quality
• Blood pressure using an appropriate cuff and reliable technique
• Mental status and new neurologic findings
• Skin color, temperature, diaphoresis, and capillary refill
• Severity and trajectory of symptoms
• Ability to sit, stand, and ambulate safely

Findings that generally require emergency evaluation

• Persistent chest pressure or discomfort concerning for acute coronary syndrome
• Hemodynamic instability, shock, or poor perfusion
• Significant hypoxemia or respiratory distress
• New focal neurologic deficit or suspected stroke
• Sustained tachyarrhythmia or bradyarrhythmia with symptoms
• Syncope with exertion, injury, abnormal ECG, structural heart disease, or concerning family history
• Sudden severe chest or back pain with concern for acute aortic syndrome
• Suspected pulmonary embolism, myocarditis, cardiac tamponade, or decompensated heart failure
• New ischemic ECG changes or a clearly dangerous rhythm
• Pregnancy or postpartum status with chest pain, dyspnea, severe hypertension, syncope, or thromboembolic symptoms
• Inability to provide the serial testing, monitoring, imaging, or intervention needed to address the remaining risk

When emergency transfer is indicated, do not allow diagnostic curiosity or low-yield office testing to delay transport. Follow local EMS and transfer protocols. A patient with potential acute coronary syndrome, stroke, unstable arrhythmia, severe hypoxemia, or hemodynamic compromise should generally not drive independently.

Focused Cardiovascular History

The history should establish the symptom phenotype and the patient’s baseline risk.

Symptom characterization

• Exact onset and what the patient was doing at the time
• Sudden versus gradual onset
• Maximum severity at onset or progressive intensification
• Location, radiation, quality, duration, frequency, and recurrence
• Exertional, positional, pleuritic, postprandial, or reproducible features
• Provoking and relieving factors
• Associated dyspnea, nausea, diaphoresis, weakness, palpitations, syncope, fever, cough, hemoptysis, neurologic symptoms, or leg swelling
• Whether the current episode differs from prior episodes

Risk factors and context

• Known coronary artery disease, heart failure, arrhythmia, valvular disease, congenital disease, or prior thromboembolism
• Hypertension, diabetes, dyslipidemia, kidney disease, obesity, smoking, and sleep apnea
• Recent surgery, hospitalization, immobility, long travel, trauma, cancer, pregnancy, postpartum status, or estrogen exposure
• Recent viral illness or systemic infection
• Cocaine, methamphetamine, excessive caffeine, nicotine, energy products, decongestants, or other stimulants
• Prescription and nonprescription medications, adherence, recent changes, and interactions
• Anticoagulant or antiplatelet use
• Family history of premature coronary disease, cardiomyopathy, arrhythmia, aortic disease, or sudden unexplained death

History findings and what they help assess

Finding	Diagnostic concern it raises or lowers
Exertional pressure, heaviness, or dyspnea	Raises concern for myocardial ischemia, outflow obstruction, or significant cardiopulmonary disease
Sudden maximal chest or back pain	Raises concern for acute aortic syndrome, pulmonary embolism, or pneumothorax
Pleuritic pain with dyspnea or hemoptysis	Raises concern for pulmonary embolism, pneumonia, pleural disease, or pneumothorax; it does not exclude ischemia
Pain reproduced with palpation or movement	Supports a musculoskeletal source but does not independently exclude acute coronary syndrome
Palpitations before loss of consciousness	Raises concern for arrhythmic syncope
Syncope while supine or exercising	Raises concern for cardiac syncope
Orthostatic symptoms after fluid loss or medication change	Supports volume depletion or medication-related hypotension, after more dangerous causes are considered
Unilateral leg swelling after immobilization or estrogen exposure	Raises concern for deep-vein thrombosis and pulmonary embolism
Bilateral edema with orthopnea or weight gain	Raises concern for heart failure or systemic volume overload

Focused Physical Examination

A cardiovascular examination in urgent care should be targeted, reproducible, and documented with both pertinent positives and negatives.

Core examination

• General appearance, distress, diaphoresis, and perfusion
• Repeat vital signs when initial values are abnormal or technique is questionable
• Pulse rate, regularity, symmetry, and strength
• Cardiac rate and rhythm, murmurs, gallops, or rub when appreciable
• Lung sounds, air movement, crackles, wheezing, and asymmetry
• Jugular venous distention when the examination is technically reliable
• Extremity temperature, color, edema, tenderness, and asymmetry
• Distal pulses and capillary refill
• Chest-wall tenderness or pain with movement
• Focused neurologic examination when dizziness, syncope, weakness, or severe hypertension is present

Orthostatic measurements

Orthostatic vital signs can support volume depletion, medication effects, or autonomic dysfunction, but they should not be used as a stand-alone explanation for syncope or dizziness. A patient may have orthostatic changes and a concurrent arrhythmia, hemorrhage, pulmonary embolism, acute coronary syndrome, or neurologic emergency.

Must-Not-Miss Differential Diagnosis

Acute coronary syndrome

Pathophysiology: Acute coronary syndrome results from a sudden reduction in coronary blood flow, commonly involving plaque disruption and thrombosis, producing myocardial ischemia or infarction.

Differentiating clues: Pressure, heaviness, squeezing, burning, exertional symptoms, radiation, dyspnea, diaphoresis, nausea, or ischemic ECG changes increase concern. Women, older adults, and patients with diabetes may have less classic symptom descriptions. Neither a benign appearance nor a single normal ECG reliably excludes acute coronary syndrome. Serial cardiac troponin—preferably high-sensitivity troponin—is the preferred biomarker strategy for myocardial injury in acute chest pain.[1]

Plan if suspected: Activate emergency evaluation and transport according to stability and local protocol. Do not attempt to “rule out” acute coronary syndrome in an urgent-care clinic lacking serial troponin testing, validated pathways, monitoring, and rescue capability.

Acute pulmonary embolism

Pathophysiology: A thrombus, usually arising in the deep veins of the legs or pelvis, embolizes to the pulmonary arterial circulation. The resulting vascular obstruction can impair oxygenation and strain the right ventricle.

Differentiating clues: Sudden dyspnea, pleuritic pain, tachycardia, hypoxemia, hemoptysis, syncope, unilateral leg symptoms, recent surgery or immobility, pregnancy or postpartum status, estrogen exposure, cancer, obesity, smoking, or prior thromboembolism increase concern. Normal oxygen saturation does not exclude PE. The 2026 multisociety guideline recommends integrating clinical probability with D-dimer and definitive imaging; computed tomography pulmonary angiography remains the standard imaging test for most adults requiring imaging.[2]

Plan if suspected: Refer to the emergency department for probability-based testing and imaging. Do not use an isolated negative office test or reassuring appearance to replace a validated diagnostic pathway.

Acute aortic syndrome

Pathophysiology: Aortic dissection involves a tear in the intima allowing blood to track within the aortic wall; related acute aortic syndromes include intramural hematoma and penetrating ulcer. Rupture or branch-vessel compromise may rapidly become fatal.

Differentiating clues: Abrupt severe chest, back, abdominal, neck, or jaw pain; pulse or blood-pressure asymmetry; a new neurologic deficit; syncope; aortic regurgitation; known aneurysm; connective-tissue disorder; bicuspid aortic valve; pregnancy; or a family history of aortic disease increases concern.[3]

Plan if suspected: Immediate emergency transport for definitive imaging and specialist management. Do not delay transfer while attempting extensive outpatient testing.

Dangerous arrhythmia

Pathophysiology: Tachyarrhythmias or bradyarrhythmias can reduce cardiac output, provoke ischemia, or degenerate into cardiac arrest. Atrial fibrillation also carries thromboembolic risk, while ventricular rhythms and high-grade conduction disease may signal immediate danger.

Differentiating clues: Ongoing palpitations with chest pain, dyspnea, hypotension, syncope, heart failure findings, very rapid or slow rate, wide-complex tachycardia, high-grade atrioventricular block, pre-excitation, prolonged QT with symptoms, or a family history of sudden death is concerning. A normal ECG obtained after symptoms resolve does not exclude intermittent arrhythmia.

Plan if suspected: Unstable rhythms require emergency protocol and transport. New atrial fibrillation, symptomatic arrhythmia, or uncertain wide-complex rhythm generally requires a higher level of evaluation rather than empiric outpatient rate or rhythm treatment.[4,9]

Acute heart failure

Pathophysiology: Elevated filling pressures and/or inadequate cardiac output cause pulmonary or systemic congestion and impaired organ perfusion. Decompensation may be precipitated by ischemia, arrhythmia, infection, renal dysfunction, medication nonadherence, or excessive sodium and fluid intake.

Differentiating clues: Dyspnea, orthopnea, paroxysmal nocturnal dyspnea, rapid weight gain, crackles, jugular venous distention, hypoxemia, edema, or an S3 raises concern. Peripheral edema alone is nonspecific and may result from venous, renal, hepatic, medication-related, or lymphatic causes.[5]

Plan if suspected: New, hypoxemic, hemodynamically abnormal, or significantly symptomatic heart failure requires emergency evaluation. Stable chronic edema without cardiopulmonary symptoms may be evaluated longitudinally, but avoid initiating or intensifying diuretics without considering renal function, electrolytes, volume status, and the underlying diagnosis.

Pericarditis, myocarditis, and cardiac tamponade

Pathophysiology: Pericardial inflammation can cause positional or pleuritic pain; myocarditis causes inflammatory myocardial injury and may impair ventricular function or provoke arrhythmia. Rapid or large pericardial effusion may restrict cardiac filling and cause tamponade.

Differentiating clues: Recent viral illness, chest pain improved by leaning forward, a pericardial rub, diffuse ST-segment changes, troponin elevation, ventricular dysfunction, arrhythmia, hypotension, jugular venous distention, or pulsus paradoxus may be present. These findings are variable, and absence of a classic pattern does not exclude disease.

Plan if suspected: Emergency evaluation is appropriate when myocarditis, significant effusion, tamponade, ischemia, arrhythmia, or diagnostic uncertainty remains.

Symptom-Based Approach

Chest Pain or Chest Discomfort

Ask first

• Is the patient unstable?
• Is the symptom new, changing, exertional, persistent, or occurring at rest?
• Are acute coronary syndrome, pulmonary embolism, aortic syndrome, pneumothorax, myocarditis, pericarditis, esophageal rupture, or another emergency plausible?
• Can the clinic provide the testing and observation necessary to lower risk adequately?

Common nonemergent considerations

• Chest-wall strain or costochondral pain
• Gastroesophageal or esophageal symptoms
• Anxiety or panic symptoms after medical causes are considered
• Viral pleurisy
• Stable chronic symptoms already under appropriate evaluation

Reproducibility, pleuritic quality, sharpness, young age, or apparent anxiety should not be used individually to declare pain noncardiac.

ECG role

Obtain an ECG promptly when ischemia, arrhythmia, pericarditis, or another cardiac process is possible. Compare with prior tracings when available. Examine rate, rhythm, axis, intervals, QRS width, ST-T morphology, pathologic Q waves, hypertrophy patterns, ectopy, and conduction disease.

A normal or unchanged tracing does not exclude acute coronary syndrome. Conversely, an automated interpretation stating “abnormal ECG” does not establish a specific diagnosis. The clinician should document an independent interpretation or follow the clinic’s process for qualified interpretation.

Palpitations

Palpitations may reflect premature beats, supraventricular tachycardia, atrial fibrillation, ventricular arrhythmia, sinus tachycardia from another illness, medications, stimulants, anemia, pregnancy, hyperthyroidism, anxiety, or heightened awareness of a normal rhythm.

High-risk features

• Syncope or near-syncope
• Exertional onset
• Chest pain or dyspnea
• Structural heart disease or heart failure
• Abnormal ECG
• Persistent very rapid or slow rate
• Family history of sudden cardiac death
• Known channelopathy or cardiomyopathy
• Electrolyte-loss history or QT-prolonging medications

When the patient is stable and the ECG is nondiagnostic, outpatient ambulatory monitoring may be appropriate through primary care or cardiology. Document that a normal snapshot ECG cannot exclude an intermittent rhythm.

Syncope and Presyncope

Syncope is a transient loss of consciousness from global cerebral hypoperfusion, typically with rapid onset, short duration, and spontaneous recovery. Distinguish true syncope from seizure, intoxication, metabolic disturbance, mechanical fall, vertigo, and psychogenic events.

The ACC/AHA/HRS syncope guideline supports a detailed history, physical examination, and ECG during the initial evaluation. Routine broad laboratory testing and routine neuroimaging are not useful unless the history or examination indicates a specific need.[6]

Features suggesting higher risk

• Syncope during exertion or while supine
• Preceding palpitations or chest pain
• Abnormal ECG
• Known structural heart disease
• Family history of sudden death
• Persistent hypotension, severe anemia, bleeding, or hypoxemia
• New neurologic deficit
• Major injury
• Pregnancy or postpartum status
• Older age with comorbidity or recurrent unexplained episodes

Apparent vasovagal or orthostatic syncope should be diagnosed from a coherent history and examination, not from a single mildly abnormal orthostatic reading.

Elevated Blood Pressure

The 2025 multisociety adult hypertension guideline retains the following categories: normal below 120/80 mm Hg, elevated systolic pressure 120–129 mm Hg with diastolic pressure below 80 mm Hg, stage 1 hypertension at 130–139 mm Hg systolic or 80–89 mm Hg diastolic, and stage 2 hypertension at 140/90 mm Hg or higher.[7]

First verify the measurement

• Use an appropriate cuff size
• Position the patient correctly
• Allow rest when feasible
• Address pain, anxiety, bladder distention, nicotine, caffeine, and recent exertion
• Repeat the measurement manually when accuracy is in question
• Compare arms when acute aortic disease or vascular abnormality is a concern

Hypertensive emergency versus asymptomatic elevation

Hypertensive emergency is severe elevation accompanied by new or worsening target-organ injury, such as encephalopathy, stroke, acute coronary syndrome, acute heart failure with pulmonary edema, aortic syndrome, acute kidney injury, or serious pregnancy-related disease. The number alone does not establish the emergency; the organ injury does.

The AHA advises a cautious, individualized approach to asymptomatic markedly elevated blood pressure in acute-care settings, emphasizing accurate repeat measurement, evaluation for target-organ damage, treatment of underlying contributors, and reliable outpatient follow-up rather than reflexive rapid lowering.[8]

Avoid administering short-acting medication merely to normalize an isolated number for discharge. Rapid reduction without a supported indication may cause cerebral, coronary, or renal hypoperfusion. New medication initiation or chronic regimen adjustment requires medication reconciliation, pregnancy assessment when relevant, evaluation of contraindications, and a concrete follow-up plan.

Dyspnea and Edema

Cardiovascular causes of dyspnea include heart failure, ischemia, arrhythmia, valvular disease, pericardial disease, and pulmonary embolism. Noncardiac causes include asthma, COPD, pneumonia, pneumothorax, anemia, metabolic acidosis, anxiety, and other systemic disease.

Unilateral leg swelling

Consider deep-vein thrombosis, cellulitis, trauma, ruptured Baker cyst, venous obstruction, and lymphedema. Measure both limbs at comparable landmarks when useful and document erythema, warmth, tenderness, pitting, venous changes, wounds, pulses, and neurologic status. Physical examination alone cannot reliably exclude deep-vein thrombosis.

Bilateral edema

Consider heart failure, chronic venous insufficiency, renal or hepatic disease, medication effects, pregnancy, lymphedema, and prolonged dependency. New edema with dyspnea, orthopnea, chest symptoms, hypoxemia, or rapid weight gain warrants more urgent evaluation than chronic stable dependent edema.

Diagnostic Testing in Urgent Care

Electrocardiography

An ECG can identify ischemic patterns, arrhythmias, conduction disease, pre-excitation, QT prolongation, hypertrophy, or pericarditis patterns. It is a risk-stratification tool, not a universal rule-out test.

Document:

• Indication
• Rate and rhythm
• Important intervals and QRS width when relevant
• ST-segment and T-wave findings
• Ectopy or conduction findings
• Comparison with prior tracing, if available
• Effect of the interpretation on disposition

Chest radiography

Radiography may support diagnoses such as pneumonia, pneumothorax, pulmonary edema, or other thoracic disease. A normal radiograph does not exclude acute coronary syndrome, pulmonary embolism, early heart failure, aortic syndrome, or every important pulmonary process.

Point-of-care tests

Glucose, pregnancy testing, hemoglobin, electrolytes, or other clinic-specific tests may identify contributors or affect medication and imaging decisions. Do not order a test simply because it is available. Ask whether the result can safely change disposition.

Troponin and D-dimer limitations

Single non–high-sensitivity troponin testing without a validated pathway, appropriate timing, and serial assessment should not be presented as excluding acute coronary syndrome. Likewise, D-dimer should be used only after clinical probability assessment and with an understanding of the assay and applicable threshold. A high-probability PE presentation generally requires imaging rather than a rule-out D-dimer strategy.[1,2]

Treatment Boundaries in Urgent Care

Aspirin

Aspirin may be indicated in suspected acute coronary syndrome under local protocol, but it is not appropriate for every patient with chest discomfort. Check for allergy, active bleeding, aortic dissection concern, major bleeding risk, and other contraindications. Administration must not delay EMS activation or definitive care.

Nitroglycerin

Nitroglycerin response is not diagnostic of ischemia. Use only when indicated and permitted by protocol after reviewing blood pressure, phosphodiesterase-5 inhibitor exposure, right-ventricular infarction concern, severe aortic stenosis, and other contraindications. Do not use symptom response as proof that pain was or was not cardiac.

Antihypertensive therapy

Treat hypertensive emergency in an appropriately monitored emergency or inpatient setting. For asymptomatic elevation, prioritize measurement accuracy, target-organ assessment, medication reconciliation, contributor identification, and follow-up. Avoid rapid, unmonitored reduction.

Arrhythmia treatment

Unstable arrhythmias require emergency protocols. New atrial fibrillation or another persistent rhythm requires assessment of onset, stability, stroke risk, heart failure, ischemia, contributing illness, and medication contraindications. Avoid empiric rate-control or rhythm-control treatment without sufficient diagnostic clarity, monitoring, and follow-up.[4]

Diuretics

Do not treat undifferentiated edema reflexively with a diuretic. Consider renal function, electrolytes, blood pressure, volume status, pregnancy, medication interactions, and the underlying diagnosis. New heart failure or pulmonary edema generally requires emergency-level evaluation.

Disposition Framework

Emergency department or EMS transfer

Choose emergency evaluation when instability, a time-sensitive diagnosis, abnormal ECG, significant symptom burden, or the need for serial testing, imaging, monitoring, or intervention exceeds clinic capability.

Same-day or expedited specialist evaluation

This may be appropriate for selected stable patients when a reliable receiving clinician has accepted the patient and the required diagnostic pathway can be completed promptly. Do not substitute an uncertain referral for emergency evaluation when delay could cause harm.

Outpatient management

Outpatient disposition is most defensible when:

• Vital signs are stable or appropriately explained and improving
• Examination does not suggest acute cardiopulmonary compromise
• ECG and available testing do not reveal a high-risk finding
• The remaining differential is low risk within the limitations of the setting
• The patient can obtain medications and follow-up
• Return and emergency precautions are specific and understood

Documentation and Medical Decision Making

A strong cardiovascular urgent-care note should show the clinician’s reasoning rather than merely list normal findings.

Document the following

• Exact symptom onset, character, trajectory, and associated features
• Relevant cardiovascular, thromboembolic, medication, stimulant, pregnancy, and family risks
• Initial and repeated vital signs
• Pertinent cardiovascular, pulmonary, vascular, and neurologic findings
• ECG interpretation and comparison with prior tracings when available
• Tests ordered, results, and important testing limitations
• Dangerous diagnoses considered and why they remain concerning or became less likely
• Rationale for emergency transfer, expedited referral, or outpatient care
• Patient response to treatment and reassessment findings
• Transport recommendation and acceptance or refusal
• Follow-up interval and explicit return precautions

Example medical decision-making language

Acute coronary syndrome, pulmonary embolism, acute aortic syndrome, clinically significant arrhythmia, and other cardiopulmonary emergencies were considered. The patient’s current findings and the limitations of urgent-care testing were discussed. Because serial cardiac biomarkers, advanced imaging, and continuous monitoring are not available here, emergency-department evaluation was recommended to exclude time-sensitive disease.

For a genuinely low-risk outpatient presentation, document the positive evidence supporting the working diagnosis, not only the absence of danger signs.

Informed Refusal of Emergency Evaluation

If a patient declines recommended transfer:

1. Reassess decision-making capacity.
2. Explain the specific suspected conditions and material risks of delay, including disability or death when applicable.
3. Explain why urgent-care testing cannot adequately exclude those conditions.
4. Recommend the safest transport method.
5. Explore barriers such as cost, transportation, caregiving, fear, or misunderstanding.
6. Offer reasonable alternatives without falsely presenting them as equivalent.
7. Document the conversation, patient questions, demonstrated understanding, final choice, and witnessed forms according to policy.
8. Provide explicit instructions to call 911 for worsening or specified symptoms.

A signed form alone does not replace an informed-refusal discussion.

Common ICD-10-CM and CPT Considerations

Codes must reflect the actual encounter, current code set, payer rules, and documented level of diagnostic certainty.

Common symptom and diagnosis codes

• R07.9 — Chest pain, unspecified
• R00.2 — Palpitations
• R55 — Syncope and collapse
• R06.02 — Shortness of breath
• R42 — Dizziness and giddiness
• R60.0 — Localized edema
• R03.0 — Elevated blood-pressure reading, without diagnosis of hypertension
• I10 — Essential (primary) hypertension, when established and addressed
• R00.0 — Tachycardia, unspecified
• R00.1 — Bradycardia, unspecified
• I48.91 — Unspecified atrial fibrillation, when actually established

Avoid coding acute coronary syndrome, pulmonary embolism, heart failure, or another definitive disease solely because it was considered in the differential.

ECG coding concepts

• 93000 generally describes a routine 12-lead ECG with tracing, interpretation, and report.
• 93005 generally describes tracing only, without interpretation and report.
• 93010 generally describes interpretation and report only.

Do not report components inconsistently or duplicate another entity’s billing. The interpretation should be documented and medically necessary. E/M code selection is based on the applicable current rules, including medical decision making or time when permitted; the number of documented words does not determine the visit level.[10]

Clinical Pearls

• A single normal ECG does not rule out acute coronary syndrome or intermittent arrhythmia.
• Reproducible chest tenderness lowers concern for some causes but does not eliminate ischemia.
• Improvement after antacid, bronchodilator, nitroglycerin, analgesic, or reassurance is not a definitive diagnostic test.
• Orthostatic vital signs may identify a contributor without proving the complete cause of syncope.
• Severe blood-pressure elevation becomes a hypertensive emergency when accompanied by acute target-organ injury, not simply because a numeric threshold is exceeded.
• New unilateral leg swelling should trigger structured thromboembolic risk assessment; physical examination alone cannot exclude DVT.
• “Anxiety” is a diagnosis that should follow, not precede, assessment for dangerous cardiopulmonary causes.
• If the clinic lacks the serial testing or imaging needed to answer the safety question, the limitation itself may determine disposition.

Expected Course and Follow-Up

Prognosis depends entirely on the underlying diagnosis. Benign premature beats, musculoskeletal chest pain, transient medication-related tachycardia, and chronic venous disease may have favorable courses, but only after time-sensitive conditions have been reasonably addressed. Persistent, recurrent, exertional, progressive, or unexplained cardiovascular symptoms require longitudinal evaluation even when the urgent-care encounter is reassuring.

Potential complications of missed or delayed cardiovascular disease include myocardial infarction, malignant arrhythmia, stroke, right-heart failure, aortic rupture, cardiogenic shock, pulmonary infarction, sudden cardiac arrest, permanent disability, and death.

Emergency Return Precautions

Patients managed outside the emergency department should be instructed to call 911 or seek immediate emergency care for:

• New or worsening chest pressure, tightness, heaviness, or pain
• Shortness of breath, cyanosis, or inability to speak normally
• Syncope, near-syncope, confusion, or seizure
• New weakness, numbness, facial droop, speech difficulty, or vision loss
• Sustained rapid, slow, or irregular heartbeat with symptoms
• Sudden severe chest, back, or abdominal pain
• Hemoptysis or rapidly worsening unilateral leg swelling
• Severe headache, neurologic symptoms, or pregnancy-related warning signs with marked hypertension
• Any rapid clinical deterioration

Summary

Cardiovascular urgent-care evaluation is fundamentally an exercise in risk recognition and disposition. Begin with stability, characterize the symptom precisely, identify patient-specific risks, perform a focused cardiopulmonary and vascular examination, and use ECG and other tests only for questions they can validly answer. Do not allow a single normal tracing, symptom improvement, or an appealing benign diagnosis to substitute for serial biomarkers, definitive imaging, observation, or consultation when serious disease remains plausible.

The safest urgent-care clinician is not the one who forces every presentation into an outpatient diagnosis. It is the clinician who recognizes uncertainty, communicates it clearly, and directs the patient to the level of care capable of resolving it.

References

1. Centers for Medicare & Medicaid Services. Evaluation and management services: Medicare provider compliance tips [Internet]. Baltimore (MD): Centers for Medicare & Medicaid Services; 2026 [cited 2026 Aug 14]. Available from: https://www.cms.gov/training-education/medicare-learning-networkr-mln/compliance/medicare-provider-compliance-tips/evaluation-management-services

2. Gulati M, Levy PD, Mukherjee D, et al. 2021 AHA/ACC/ASE/CHEST/SAEM/SCCT/SCMR guideline for the evaluation and diagnosis of chest pain: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. 2021;144(22). doi:10.1161/CIR.0000000000001029. Available from: https://www.acc.org/Guidelines/Hubs/Chest-Pain

3. Creager MA, Barnes GD, Giri J, et al. 2026 AHA/ACC/ACCP/ACEP/CHEST/SCAI/SHM/SIR/SVM/SVN guideline for the evaluation and management of acute pulmonary embolism in adults. J Am Coll Cardiol. Published online February 19, 2026. doi:10.1016/j.jacc.2025.11.005. Available from: https://www.acc.org/latest-in-cardiology/journal-scans/2026/02/17/14/32/acc-aha-release-first-ever-guideline-for-treatment-and-management-of-acute-pe

4. Isselbacher EM, Preventza O, Hamilton Black J 3rd, et al. 2022 ACC/AHA guideline for the diagnosis and management of aortic disease: a report of the American Heart Association/American College of Cardiology Joint Committee on Clinical Practice Guidelines. Circulation. 2022;146(24). doi:10.1161/CIR.0000000000001106. Available from: https://www.acc.org/Guidelines/Hubs/Aortic-Disease

5. Joglar JA, Chung MK, Armbruster AL, et al. 2023 ACC/AHA/ACCP/HRS guideline for the diagnosis and management of atrial fibrillation: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. 2024;149(1). doi:10.1161/CIR.0000000000001193. Available from: https://www.acc.org/Guidelines/Hubs/Atrial-Fibrillation

6. Heidenreich PA, Bozkurt B, Aguilar D, et al. 2022 AHA/ACC/HFSA guideline for the management of heart failure: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. 2022;145(18). doi:10.1161/CIR.0000000000001063. Available from: https://www.acc.org/Guidelines/Hubs/Heart-Failure

7. Shen WK, Sheldon RS, Benditt DG, et al. 2017 ACC/AHA/HRS guideline for the evaluation and management of patients with syncope: a report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society. Circulation. 2017;136(5). doi:10.1161/CIR.0000000000000499. Available from: https://www.acc.org/Guidelines/Hubs/Syncope

8. American College of Cardiology. New high blood pressure guideline emphasizes prevention, early treatment to reduce CVD risk [Internet]. Washington (DC): American College of Cardiology; 2025 Aug 14 [cited 2026 Aug 14]. Available from: https://www.acc.org/About-ACC/Press-Releases/2025/08/13/20/03/New-high-blood-pressure-guideline-emphasizes-prevention-early-treatment-to-reduce-CVD-risk

9. Bress AP, Anderson TS, Flack JM, et al. The management of elevated blood pressure in the acute care setting: a scientific statement from the American Heart Association. Hypertension. 2024;81(8). doi:10.1161/HYP.0000000000000238. Available from: https://professional.heart.org/en/science-news/management-of-elevated-blood-pressure-in-the-acute-care-setting

10. Al-Khatib SM, Stevenson WG, Ackerman MJ, et al. 2017 AHA/ACC/HRS guideline for management of patients with ventricular arrhythmias and the prevention of sudden cardiac death. Circulation. 2018;138(13). doi:10.1161/CIR.0000000000000549. Available from: https://www.acc.org/Guidelines/Hubs/Ventricular-Arrhythmias