Early Postoperative Angiographic Results
The overall early occlusion rate in 1283 patients was 1.2% (56/4518); occlusion rates of ITA and NT SV were 0.08% (1/1259) and 1.7% (55/3260), respectively. Of the 55 occluded SV anastomoses in 53 patients, 41 SVs were grafted to the RCA territory (32 posterior descending arteries, 8 right posterolateral arteries, and 1 RCA), 13 SVs were grafted to the obtuse marginal arteries, and 1 SV was grafted to the diagonal artery. The SV occlusions occurred at the terminal (n=50, 90.9%) or sequential (n=5, 9.1%) anastomosis of SV composite grafts. The occlusion rates were lower in patients using the NT SV with pedicle tissue than in patients using the NT SV without pedicle tissue, with marginal significance (1.3% [23/1797] versus 2.2% [32/1463]; P =0.062).