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The Annals of Thoracic Surgery, Vol 55, 582-584, Copyright © 1993 by The Society of Thoracic Surgeons

ARTICLES

Third-time coronary artery bypass grafting: midterm results

WH Merrill, CC Elkins, JR Stewart, WH Frist and HW Bender Jr
Department of Cardiac and Thoracic Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee.

Minimal data are available regarding the results of patients who have undergone myocardial revascularization more than twice. The records of 13 consecutive patients who underwent a coronary artery bypass procedure for the third time were reviewed. The indication for operation was unstable angina in all patients. All patients were placed on cardiopulmonary bypass through a median sternotomy. The mean number of bypass grafts placed at the third operation was 1.9 (range, 1 to 3 grafts). A new internal mammary artery graft was placed in 6 patients (2 had prior internal mammary artery grafts). Hospital mortality was 7.7% (1/13). The single death was due to incomplete revascularization in a patient with poor distal vessels. Three patients required intraaortic balloon pump support postoperatively, and 2 patients had prolonged ventilatory insufficiency. There have been no late deaths. The 12 survivors have been followed up a mean of 44 months (range, 6 to 90 months). Four remain asymptomatic; 5 have mild angina easily controlled with medication. All except 1 are in improved condition compared with their preoperative status. We conclude that a third myocardial revascularization can be performed with low mortality and morbidity and with the expectation of long-lasting symptomatic improvement.

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