<s>[INST] Occlusive peripheral arterial disease in the subclavian artery in the left arm. Could you please give me more information. The blockage has been found at the begining of the artery leading into the arm. Can this condition cause headaches and blurred vision. What is the best treatment for this condition. [/INST] Hello,Yes this disease can cause your mentioned symptoms. Due to subclavian obstruction, blood from the brain is diverted to arm from side vessel leading to decreased blood supply.You must have undergone CT scan for diagnosis and other causes of it.Best treatment is angiography and stenting of subclavian artery, so visit nearby cardiologist performing peripheral intervention.Hope this helps you and get back if you have any doubts. </s>