RESUMEN
Subclavian steal syndrome is known as reverse flow from vertebral artery to subclavian artery due to occlusion of proximal subclavian artery. Occlusive process leading to syndrome is common in left subclavian artery. Coronary-subclavian steal syndrome may happen by reverse flow in left internal thoracic artery with occlusion in subclavian artery of patients who were performed coronary artery bypass grafting surgery using left internal thoracic artery. Subclavian steal syndrome may occur during coronary artery bypass grafting surgery or postoperatively with progression of lesion. We want to represent a cases who has carotico-subclavian steal syndrome of which one was detected before and the other one was detected after the coronary artery bypass grafting (CABG) surgery.