LONG-TERM RESULTS FOLLOWING CORONARY-BYPASS OPERATION - IMPORTANCE OF PREOPERATIVE FACTORS AND COMPLETE REVASCULARIZATION

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  • 1 January 1981
    • journal article
    • research article
    • Vol. 82  (3) , 383-390
Abstract
The initial 102 patients who underwent aorta-coronary bypass grafting between 1969 and 1971 were followed for a mean of 96 mo. (minimum follow-up 7 yr). Preoperative variables predictive of survival at 5 yr were stability of angina, previous heart failure and left ventricular function. Stability of angina, previous heart failure, previous myocardial infarction and smoking were important predictors of symptomatic status at 5 yr. At operation, 62 patients had anatomic or technically complete revascularization, while 40 had incomplete revascularization. There was a significantly improved survival rate in those patients who were completely revascularized. The 5 yr survival rate was 84% for completely revascularized patients compared to 69% for incompletely revascularized patients (P < 0.02). This improvement in survival was continued to 9 yr. There was also a significant improvement in asymptomatic status of the completely revascularized patients compared to the incompletely revascularized patients. At 2 yr, 75% of the completely revascularized subjects were asymptomatic compared to 45% of the incompletely revascularized patients. This difference disappeared after 5 yr. Complete myocardial revascularization is superior to incomplete revascularization in terms of survival and asymptomatic state. Preoperative variables may be useful in predicting postoperative results.