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Ann Thorac Surg 1992;53:22-29
© 1992 The Society of Thoracic Surgeons


Articles

Operative risks and long-term results of operation for left ventricular aneurysm

Masashi Komeda, MD, Tirone E. David, MD*, Azhar Malik, MD, Joan Ivanov, RN, Zhao Sun, MSc

Division of Cardiovascular Surgery, Toronto Hospital, Western Division, and University of Toronto, Toronto, Ontario, Canada

* Address reprint requests to Dr David, 200 Elizabeth St, 13EN219, Toronto, Ont, Canada M5G 2C4.

A review of 336 consecutive patients who underwent repair of left ventricular aneurysm from 1978 to 1989 disclosed that partial resection of the aneurysm and conventional closure of the ventriculotomy was performed in 281 patients, inverted T closure in 17, and endocardial patch in 38. These two latter techniques were developed in an attempt to restore normal left ventricular geometry. The operative mortality was 6.8% (23 patients). A stepwise logistic regression analysis of various preoperative clinical, hemodynamic, and angiographic variables revealed that left ventricular ejection fraction of 0.20 or less, age greater than 60 years, previous myocardial revascularization, lack of angina, and New York Heart Association functional class IV were independent predictors of operative mortality. The technique of repair was not a predictor of outcome, but when patients with poor left ventricular function were analyzed separately, the operative mortality was reduced from 12.5% to 6.5% when newer techniques were employed. Patients were followed up during a mean of 6.3 years. There have been 51 late deaths, 45 cardiac. Cox regression analysis indicated that poor left ventricular function and left main coronary artery stenosis were the only two predictors of late mortality. The actuarial survival at 10 years was 63% ± 4%. Most patients (88%) are in New York Heart Association class I or II. These data indicate excellent long-term results after repair of left ventricular aneurysm. Newer techniques of repair are valuable in patients with poor left ventricular function.




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