Coronary Artery Disease USMLE Step 1 Practice Question
A 65 year old man develops crushing substernal pain radiating to the jaw and is found to have ST elevations in leads II, III, and aVF. Several hours later he becomes bradycardic with a new junctional rhythm. Ischemia of which of the following arteries most likely accounts for the conduction abnormality?
Answer choices
- AFirst diagonal branch
- BPosterior descending artery from the left circumflex
- CRight coronary arteryCorrect answer
- DLeft anterior descending artery
- ELeft circumflex artery
- FAcute marginal branch of the right coronary artery
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