Most important as predictor of success of coronary artery bypass grafting are occlusion of safenous vein grafts and progression of atherosclerosis in native coronary arteries. These factors in semptomatic patients urge us to investigate them by coronary angiography. in our clinic, between December 1992-February 1995, coronary angiography has been performed in 49 {41 male, 8 female) symptomatic patients who have already experienced coronary artery bypass grafting.FK 'A has performed in 24 patients (49%) to safenoııs vein grafts and Lima graft or native coronary arteries with or without grafts totally 44 lesioııs in 19 native coronary arteries, 14 safenous vein grafts and 1 Lima graft. Obstructions have decreased from 82.82 ±6.5 to 14.77± 4.76 before and after angioplasty, and it was statistically significant (p<0.001). We have performed directional coronary atheretomy procedure in 1 patient in native circumflex artery. No major complication has occured during procedures. From the point of treatment strategy, reoperation carries a special role in coronary artery bypass grafting experienced symptomatic patients because of its high mortality and modalities; We could say that therapeutic intervention seems to be more advantageous and less risky in comparison to reoperation.