Heart Failure USMLE Step 1 Practice Question
A 45-year-old man with hypertension presents with crushing substernal chest pain radiating to the left arm for 2 hours. Vital signs: BP 165/95 mmHg, HR 112 bpm, RR 20, temp 37.2°C, SpO2 98% on room air. ECG shows ST-elevation in leads II, III, and aVF with reciprocal ST-depression in I and aVL. Troponin I is elevated at 2.8 ng/mL. He denies shortness of breath. Which coronary artery is most likely occluded?
Answer choices
- ARight coronary arteryCorrect answer
- BLeft anterior descending artery
- CPosterior descending artery
- DLeft main coronary artery
- ELeft circumflex artery
- FDiagonal branch of the left anterior descending artery
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