Results of multiple coronary artery bypass grafting in Japanese patients.

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Abstract
Multiple coronary artery bypass grafting with more than 4 grafts has been carried out in 64 Japanese patients during a 3.5 year period. There were 55 males and 9 females; ages ranged from 34 to 75 with a mean of 58.9 years old. Double, triple and left main disease were noted in one (2%), 54 (84%) and 9 (14%) patients, respectively. There was 54 (84%) stable and 10 (16%) unstable angina pectoris, and 28 (44%) patients had previous myocardial infarction. The saphenous vein graft was used for all patients with a preferential use of sequential graft (84%). The internal mammary artery graft was used in 55 (86%) patients and the right gastroepiploic artery graft was used in 6 (9%) patients. There were 2 (3.1%) early and 2 (3.1%) late deaths. New Q wave was noted in 2 (3.1%) patients and intraaortic balloon pumping was required in 3 (4.7%) patients. The mean number of grafts was 4.4 ranged from 4 to 7, and the mean aortic cross clamp time and cardiopulmonary bypass time was 74.5 min and 134.3 min, respectively. Graft patency within 6 postoperative months was 86% (120/140) in saphenous veins, 96% (52/54) in internal mammary arteries and 100% (5/5) in gastroepiploic arteries. Relief of angina was noted in 58 (96.7%) of 60 survivors. It was concluded that the increase in the number of coronary artery anastomoses does not increase surgical risk and favorable outcome and acceptable graft patency can be obtained by multiple grafting for patients with severe multivessel coronary artery disease.