Angiography of the left upper extremity at rest demonstrates patency of the left subclavian artery down to the brachial artery at the level of the elbow. The radial artery is occluded at its origin without distal perfusion.
Angiography of the left upper extremity during arm raise demonstrated a 3 cm segment of severe stenosis of the proximal subclavian artery at the level of the extranumery cervical rib.