[The correlation between the intraoperative flow of coronary artery bypass grafts and the patency of grafts at midterm follow-up].
We evaluated the correlation between the intraoperative flow of coronary artery bypass grafting (CABG) and the patency of grafts at midterm follow-up. When internal mammary arteries were used as grafts, there was no correlation between graft flow rate and graft patency rate. On the other hand, when saphenous vein was used, the greater graft flow was associated with better graft patency. Receiver operator characteristic( ROC) analysis identified the optimum threshold for the intraoperative flow rate to predict the patency at midterm follow-up as 23 ml/min (sensitivity 78%, specificity 71%). The difference in the correlation( of flow rate with patency rate) between the 2 graft types was attributed to the difference of physiological reaction of each type of grafts.
Department of Cardiovascular Surgery, Japanese Red Cross, Japan.
Kenichirou
K
Taniguchi
Kazuyuki
K
Miyamoto
Hiroyuki
H
Kohno
D000368:Aged; D001783:Blood Flow Velocity; D001026:Coronary Artery Bypass; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007432:Intraoperative Period; D008297:Male; D008323:Mammary Arteries; D012372:ROC Curve; D012501:Saphenous Vein; D014654:Vascular Patency