A new form of coronary subclavian steal syndrome: a saphenous vein graft-coronary-subclavian unidirectional steal syndrome.

Coronary subclavian steal syndrome refers to decreased or reversed internal mammary artery flow, which causes angina related to severe subclavian steno-occlusive disease in patients with in situ internal mammary-to-coronary artery graft. We present a 48-year-old man with cerebrovascular and peripheral artery disease and the first case in the literature of a saphenous vein graft-coronary-subclavian unidirectional steal syndrome.