Coronary Artery Disease USMLE Step 1 Practice Question
A 62-year-old man with a 40-pack-year smoking history presents with substernal chest pain that began 6 hours ago while mowing his lawn. The pain radiates to his left arm and is accompanied by diaphoresis and dyspnea. His ECG shows ST-segment elevation in leads II, III, and aVF. Which of the following coronary arteries is most likely occluded?
Answer choices
- ALeft anterior descending artery
- BLeft circumflex artery
- CDiagonal branch of the LAD
- DLeft main coronary artery
- ERight coronary arteryCorrect answer
- FObtuse marginal branch of the left circumflex artery
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