Chest Pain in a Young Adult: When to Escalate
A 28-year-old man presents to the urgent care clinic with a 2-hour history of sharp, left-sided chest pain that worsens with deep breathing and lying flat. He describes a recent upper respiratory infection. He is tall and thin, with a BMI of 18.5. Vital signs: HR 102, BP 118/76, RR 20, SpO2 98% on room air, T 37.8°C. Physical exam reveals a subtle crunching sound over the precordium at end-expiration. ECG shows diffuse ST-segment elevation with PR depression. Point-of-care ultrasound shows a small pericardial effusion without tamponade physiology. He has no history of coronary disease, but he is anxious and asks if he is having a heart attack. The clinic has basic labs, ECG, and ultrasound, but no cardiology consult available for 2 hours.
1. What is the most likely diagnosis, and what key features support it?
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The most likely diagnosis is acute pericarditis, likely viral or post-viral. Key features: sharp, pleuritic chest pain that worsens with lying flat (positional), recent URI, diffuse ST elevation with PR depression on ECG, and a pericardial friction rub (the crunching sound). The small effusion without tamponade is consistent. The patient's young age, lack of coronary risk factors, and pleuritic nature make acute coronary syndrome less likely, though it must be considered. The presence of a friction rub is highly specific.
2. What immediate management and disposition decisions are appropriate in this urgent care setting?
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Immediate management includes NSAIDs (e.g., ibuprofen 800 mg TID) plus colchicine for symptom control and prevention of recurrence. Because the patient is stable, has no high-risk features (no fever >38°C, no subacute course, no large effusion, no tamponade, no immunosuppression), and the ECG does not show focal ischemic changes, outpatient management is reasonable. However, given the 2-hour delay in cardiology consult and the need to rule out high-risk causes, consider transfer to the emergency department for further observation, serial troponins to exclude myopericarditis, and echocardiography. The clinic should arrange urgent transport if any deterioration occurs. Shared decision-making with the patient about admission versus close outpatient follow-up is essential.