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Fig. 2A —77-year-old man 13 years after conventional coronary artery bypass graft surgery. Volume-rendered 64-slice CT scan shows patent Y vein graft (white arrow) to circumflex artery (CX) and intermediate branch (IM) with ectatic segments (black arrow) suggesting venous graft disease but that may also represent primary varicose veins. Vein graft to left anterior descending coronary artery (LAD) is patent. DG = diagonal branch.