Figure 1: Angiography before intervention. (a) Left anterior descending occlusion, 80% ostial intermediate and left circumflflex stenosis, patent saphenous vein graft to intermediate and first obtuse marginal. (b) Right coronary artery chronic total occlusion. (c) saphenous-vein graft to intermediate and first obtuse marginal. (d and f) Saphenous vein graft to posterior descending artery. (e) Saphenous vein graft to left anterior descending and first diagonal branch. LAD: Left anterior descending, IM: Intermediate, LCX: Left circumflflex, SVG: Saphenous vein graft, OM1: First obtuse marginal, RCA: Right coronary artery, CTO: Chronic total occlusion, PDA: Posterior descending artery, D1: First diagonal branch