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sohag100 12-30-2018 05:16 AM

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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