Head and Neck
Most common site of subclavian artery stenosis is in part (AIPG – 2009)
Pg. 97; Endovascular Intervention For Vascular Disease (2007) – Matthew M Thompson; ISBN- 0849339790
1. Subclavian artery is most commonly obstructed in the proximal portion -1st part (a) before the origin of vertebral & internal thoracic artery.
2. This stenosis is focal and is usually an extension of atherosclerotic narrowing from the aortic arch into the artery. The stenosis is more common on left side - Left subclavian is involved 3 times more frequently involved than the right.
3. Subclavian artery stenosis proximal to the vertebral artery leads to subclavian steal syndrome, leading to ipsilateral reversal of blood flow in the vertebral artery.