Thursday, November 23, 2017
Repeated USMLE Questions Step 1- 203
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
D-Anterior interventricular artery
E-Posterior interventricular artery
The artery to the SA node is a branch of the right coronary artery.
The correct answer is B