Prospective angiographic assessment of factors affecting early patency of saphenous vein-coronary artery bypass grafts

Australian and New Zealand Journal of Medicine
M HigginbothamG Sloman

Abstract

Between November 1977 and September 1978, early post-operative angiography was performed in 50 of 53 consecutive patients undergoing coronary artery bypass surgery. An average of 2.4 grafts per patient were applied. The overall patency rate was 82% and was not affected by the degree of proximal native vessel stenosis. Grafts to circumflex marginal vessels had a significantly lower (P < 0.05) patency rate (72%) than grafts to the left anterior descending (84%) and its diagonal branches (85%), or to the right coronary artery (90%). Ten single grafts were applied and all were patent. Forty-nine of the 50 patients had at least one patent graft. Fifty-three per cent of the grafts were considered of excellent quality and 25% patent but of fair quality only. There was a 100% patency rate for vessels of 2 mm diameter or more, which is significantly better (P < 0.01) than for vessels of 1-2 mm diameter (78%) or for vessels of less than 1 mm diameter (50%). There was a suggestion of a lower patency rate (74%) for vessels with evidence of distal disease, compared with vessels without such disease (85%). An assessment of the overall quality of the recipient vessel was made, taking both diameter and disease into account. This showed improve...Continue Reading

Citations

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