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The Journal of Thoracic and Cardiovascular Surgery, Vol 91, 767-772, Copyright © 1986 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Sequential coronary bypass grafts. Long-term follow-up

TM Kieser, GM FitzGibbon and WJ Keon

Sequential venous coronary bypass grafts have presented problems, mainly because of commonly reported differences between patency of side- to-side and end-to-side vein-coronary anastomoses. Better to define this, we have studied sequential anastomosis grafts done during a 13 year period. We concentrated specifically on 212 "double" grafts with 100% selective angiographic follow-up early, 90% at 1-year, and 44% at 5 years after operation. Four hundred twenty-four control single grafts were studied similarly. We found that patency rates of side-to-side anastomoses were much better than those of end-to-side anastomoses, whether of sequential or control single grafts. Considering specifically diagonal coronary artery-anterior descending coronary artery sequential grafts, the combined patency of all sequential anastomoses theoretically exceeds that of a comparable number of single grafts at all times of study, but the differences are small. Furthermore, there is definite danger of preserving proximal and perhaps limited bypass runoff at the cost of losing distal and perhaps more important myocardial perfusion. On balance, we believe that single vein grafts are to be preferred over sequential grafts unless shortage of conduit material or local aortic wall conditions dictate otherwise.

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