You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Commonest part of subclavian artery to be affected by stenosis is: and explain in detail?
MC site of subclavian artery stenosis is the first part of the subclavian artery.
• MC cause of subclavian artery stenosis: Atherosclerotic disease
• Left subclavian artery stenosis is significantly more common than right
• MC site of stenosis: First part of the subclavian artery
• Stenosis typically occurs just distal to the origin of the subclavian artery and lies proximal to the origin of the vertebral artery.
• Stenosis of the first part of the subclavian artery may give rise to the subclavian steal syndrome
• Subclavian steal syndrome is characterized by reversed flow in the vertebral artery to compensate for a proximal stenosis in the ipsilateral subclavian artery there by stealing blood from the ‘brain’ to feed the ‘arm’.