MRCP2-0505

MRCP2-0505

A 70-year-old male presents with a four hour history of left sided chest pain, radiating to his left arm. He also complains of sweating in both his hands and has vomited twice in the last hour. ECG demonstrates ST depression in II, III and aVF, troponin is 0.68 (normal range <0.03). On examination, he is alert but extremely clammy. You note his pulse at the radial artery is 36/ minute and regular. His BP on the cardiac monitor is 118/65. An NSTEMI is diagnosed and the patient is taken to the catheter laboratory for reperfusion therapy. Which coronary artery is most likely to be occluded?