MCQ – 88861


A 69-year-old man is brought to the emergency department because of severe epigastric pain and vomiting that started 30 minutes ago while gardening. His pulse is 55/min, respirations are 30/min, and blood pressure is 90/50 mm Hg. Physical examination shows diaphoresis and jugular venous distention. Crackles are heard in both lower lung fields. An ECG shows P waves independent of QRS complexes and ST segment elevation in leads II, III, and aVF. Coronary angiography is most likely to show narrowing of which of the following vessels?

A. Posterior interventricular artery


Left circumflex artery


Proximal right coronary artery


Left anterior descending artery

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