Which pa of subclan aery is affected by stenosis is:: (A) First pa, (B) Second pa, (C) Third pa, (D) All pas are equally affected
Answer is A. Most common etiology of subclan stenosis is atherosclerosis, and it mostly affects the ostium or proximal pa of subclan aery. Ref: Peripheral and Cerebrovascular Intervention By Deepak L. Bhatt, Page 102