A 65-Year-Old Man with a History of Coronary Artery Disease

A 65-year-old man with a history of coronary artery disease visits his doctor with complaints of exertional shortness of breath, weariness, and lower limb edema. His medical history is notable for a myocardial infarction 5 years ago and the placement of an electronic pacemaker 2 years ago. The x-ray of his chest is seen below. One of the leaders' segments is highlighted (arrow) . The highlighted segment most likely lies within which of the following structures?

A) Anterior interventricular sulcus
B) Atrioventricular groove
C) Pulmonary artery
D) Right atrium
E) Right ventricle

Correct Answer:

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