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Ann Thorac Surg 1994;58:1353-1355
© 1994 The Society of Thoracic Surgeons

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Articles

Coronary reoperation: Results of adding an internal mammary artery graft to a stenotic vein graft

Department of Thoracic and Cardiovascular Surgery, The Cleveland Clinic Foundation, Cleveland, Ohio USA

^_* Address reprint requests to Dr Lytle, The Cleveland Clinic Foundation, F25, 9500 Euclid Ave, Cleveland, OH 44195.

Although it is desirable at coronary reoperation to replace a stenotic vein graft to the left anterior descending coronary artery (LAD) with an internal mammary artery (IMA) graft, previous reports have shown that if the stenotic vein graft is removed, that strategy can be complicated by severe hemodynamic deterioration and increased perioperative mortality. We report the results for 90 patients in whom an IMA was used to graft a completely obstructed LAD with the stenotic vein graft left intact. For 10 patients, reoperation involved only an IMA-LAD graft, and in 80 patients, a second IMA, veins, or both were used to graft other vessels. There were no hospital deaths. One patient had a perioperative myocardial infarction. Follow-up at a mean postoperative interval of 58 months documented 11 late deaths (eight cardiac related) and actuarial 5-year survival of 88%. Twenty-two patients underwent coronary angiography at a mean postoperative interval of 48 months. The IMA-LAD graft was found to be perfectly patent in 20 and obstructed in 2. The strategy of adding an IMA graft to the LAD and leaving a stenotic vein graft intact has been associated with a low risk of perioperative myocardial infarction, the late clinical results are favorable, and repeat angiography indicates that serious competitive flow from the stenotic vein graft is uncommon.

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