Surgical Treatment of 200 Consecutive Patients with Left Main Coronary Artery Disease

Two hundred consecutive patients underwent myocardial revascularization for left main coronary artery disease between January, 1975, and December, 1981. The mean age of this group was 64 ± 8 years, and 78.5% of the patients were men. The anginal pattern was chronic stable in 6% of the patients and progressive or unstable in the remainder. Resting electrocardiograms showed prior myocardial infarction in 45.5%. Left ventricular enddiastolic pressure was elevated in 145 patients, and ejection fraction was less than 50% in 40 patients. The mean number of bypass grafts per patient was 3.2 ± 1.4 (standard deviation). Seventeen patients underwent major concomitant cardiovascular procedures. The operative mortality was 3.5%, and the incidence of perioperative infarction was 3%. Factors associated with reduced operative survival were increased age; unstable angina, or acute myocardial infarction, or both; female sex; circumflex-dominant circulation; and major concomitant procedures. Late mortality at a mean follow-up of 33.5 months was 6%, and 91% of the surviving patients assessed their quality of life as “excellent” or “good.”