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Old 12-30-2018
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Default Repeated USMLE Questions Step 1- 649

A 74 year-old man presents to the clinic with a complaint of palpitation and lightheadedness. Image studies revealed blockage of the artery to the SA node.
This artery arises from which of these arteries?
A-Left coronary artery
B-Right coronary artery
C-Circumflex artery
D-Anterior interventricular artery
E-Posterior interventricular artery
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