Angiographic Evidence of Coronary-Subclavian Steal Syndrome

A 49-year-old man who had undergone coronary artery bypass grafting 16 months earlier presented with complaints of increasing angina pectoris. Initial angiography of the left coronary artery showed that contrast dye went retrograde up the left internal mammary artery (LIMA) and into the subclavian artery (Figure, A). Competitive flow was observed in the chest wall …