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(Circulation. 1971;44:815.)
© 1971 American Heart Association, Inc.

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Aortocoronary Bypass Graft

Initial Blood Flow through the Graft, and Early Postoperative Patency

CLAUDE M. GRONDIN M.D.¹; GILLES LEPAGE M.D.¹; YVES R. CASTONGUAY M.D.¹; CLAUDE MEERE M.D.¹; PIERRE GRONDIN M.D.¹

¹ From the Montreal Heart Institute, Montreal, Quebec, Canada.

Intraoperative measurements of blood flow were made in 70 patients in whom a total of 103 venous bypass grafts had been inserted from the aorta to the right, the left anterior descending, or the circumflex coronary artery. Cineangiographic evaluation of graft patency was performed in all patients. Overall patency rate was 90.3%. Flow in all bypass grafts averaged 68 ml/min. All grafts with flow of 20 ml or less or which failed to respond to the injection of 20 mg of papaverine became occluded. All grafts with flow greater than 45 ml/min remained open.

Key Words: Surgery for acquired coronary artery disease • Intraoperative blood flow measurements

Submitted on April 8, 1971
Accepted on July 19, 1971

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