Figure 2.
I. Perfectly patent SV composite graft on the basis of the left ITA on early postoperative angiogram in a 55-year-old-man. The left ITA was anastomosed to the LAD (black thick arrows), and the SV graft was anastomosed to the diagonal (black arrowheads), first OM (white arrowheads), and PD (white thick arrows) arteries in a sequential manner. All the grafts showed excellent graft flow with unimpaired run-off. II. A and B, Schematic figure of bidirectionally competitive graft flow. Graft and grafted coronary artery flow are clearly opacified by graft angiography (red arrow and arrowhead), and graft flow is also visualized by native coronary angiography (blue arrow and arrowhead). C and D, Bidirectionally competitive SV composite graft on the basis of the left ITA on early postoperative angiogram in a 68-year-old-man. The left ITA was anastomosed to the LAD, and the SV graft was anastomosed to the RI (black thin arrows), OM, and PL (white thin arrows) arteries in a sequential manner. C, The SV graft anastomosed to the RI and grafted RI flow were clearly opacified by graft angiography.D, The RI flow and the SV graft distal to the RI anastomosis were also well visualized by native left coronary angiography. III. A and B, Schematic figure of unidirectionally competitive graft flow. Graft and grafted coronary artery flow are not opacified by graft angiography (red arrow and arrowhead), but graft flow is visualized by native coronary angiography (blue arrow and arrowhead). C and D, Unidirectionally competitive SV composite graft on the basis of the left ITA on early postoperative angiogram in a 75-year-old-man. The left ITA was anastomosed to the LAD, and the SV graft was anastomosed to the OM and PD arteries in a sequential manner. C, The SV graft anastomosed to the PDA and grafted PDA flow were not opacified by graft angiography. D, The PDA flow and the retrograde SV graft from the PDA were well visualized by native right coronary angiography. SV, Saphenous vein; ITA, internal thoracic artery; LAD, left anterior descending; OM, obtuse marginal; PD, posterior descending; RI, ramus intermedius; PL, posterolateral.