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The Journal of Thoracic and Cardiovascular Surgery, Vol 90, 272-277, Copyright © 1985 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Myocardial revascularization with combined aortic and mitral valve replacements

CW Akins, MJ Buckley, WM Daggett, AD Hilgenberg and WG Austen

Although the results of coronary artery bypass grafting plus single aortic or mitral valve replacement have been documented, the risk of myocardial revascularization with combined aortic and mitral valve replacement is not well defined. We present a series of 33 consecutive patients undergoing myocardial revascularization with combined aortic and mitral valve replacement during a period of almost seven years. There were 21 men and 12 women with a mean age of 67 years. All patients had congestive heart failure, and 21 (64%) had angina pectoris. Mean New York Heart Association functional classification was 3.4; eight patients (24%) had ejection fractions less than 0.40, and 13 patients (41%) had cardiac indices less than 2.0 L/min/m2. All operations were performed with hypothermic crystalloid potassium cardioplegia. The number of coronary arteries grafted varied from one to four (mean, 1.7 grafts per patient). Four patients died while in the hospital (12.1%). There were no perioperative myocardial infarctions. At a follow-up of 2 to 80 months (mean 40.7 months), death had occurred in eight (27.6%) of the 29 hospital survivors. Actuarial survival rate at 72 months was 60.7%. Although no preoperative factors predicted late death, early deaths were related significantly to severe mitral regurgitation, low ejection fraction, high New York Heart Association classification and extensive coronary artery disease (p less than 0.05). Myocardial revascularization with combined aortic and mitral valve replacement can be performed with an acceptable early mortality rate but with an appreciable late mortality rate.

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