Formation of fistulous connection between great saphenous vein graft and pulmonary vasculature after coronary artery bypass graft (CABG) is a rare event, which can result in recurrence of symptoms ranging from stable angina to myocardial infarction related to coronary steal phenomenon. We hereby report a case of a 63 years old man who was detected to have such a fistulous communication leading to coronary steal syndrome as the cause of effort angina 12 years after CABG. Coronary angioplasty and stenting of left anterior descending artery resulted in resolution of symptoms.