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The Journal of Thoracic and Cardiovascular Surgery, Vol 77, 65-75, Copyright © 1979 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Left ventricular aneurysm. Preoperative risk factors and long-term postoperative results

NA Burton, EB Stinson, PE Oyer and NE Shumway

The results of operative treatment of postinfarction left ventricular aneurysm in 169 patients undergoing operation since 1970 are analyzed in this report. Maximum follow-up extended to 7 year (average 2.9 years). Average patient age was 56 years (range 34 to 82 years). Nearly all patients (94%) had left anterior descending coronary artery disease with anterior aneurysm formation and 73% had multivessel disease. Sixty- eight percent of patients underwent aorta-coronary bypass grafting (ACBG) and/or mitral valve replacement (MVR) concomitantly with aneurysmectomy. The over-all operative mortality rate was 17.8%. Preoperative factors that correlated significantly (p less than 0.05) with increased operative risk reflected primarily the quality of left ventricular function, and included functional classification, cardiac index, contractile function of residual myocardium not involved by aneurysm, and mitral regurgitation. Patients whose primary preoperative disability consisted of angina pectoris (42 patients) exhibited significantly higher over-all survival rates (actuarial 5 year survival 75%) than those undergoing operation because of congestive heart failure (86 patients) or ventricular tachyarrhythmias (38 patients), whose 5 year survival rates were 52 and 57%, respectively. Concomitant ACBG (+/- MVR) was associated with a higher operative mortality rate than aneurysmectomy alone (21.1 versus 10.9%), but late postoperative attrition was similar. The over-all 5 year survival rate, including operative death, was 60%, and 90% of surviving patients were in Functional Class I or II at follow-up evaluation. We conclude from this analysis that the long-term prognosis of patients with symptomatic postinfection left ventricular aneurysms, although determined importantly by preoperative left ventricular function, is enhanced by surgical treatment.

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