Evaluation of surgical results. After coronary artery bypass grafting and incidence of silent ischemia post-operatively

ABSTRACT

The aim of the study was to document the effectiveness of surgery in management of after coronary artery disease and to document the incidence of silent ischemia postoperatively. 40 patients were studied coronary artery bypass grafting [1/2 to 10 years] by treadmill test for exercise induced ischemia and their exercise tolerance, from October 1990 to October 1991. They were divided into three groups Group I, up to 1 year; Group II, 1 - 5 years; Group III, 5 - 10 years postoperatively. 85.5% in group I;84.6% in group II and 62.5% in group III had improved exercise tolerance expressed by prolongation of EKG exercise test duration. 47.3% patients from group I, 46.2% patients from group II and 75% from group III were positive for stress induced ischemia and out of them 85% in group I; 77% in group II and 100% in group III had SILENT ISCHEMIA. It is suggested that E.T.T. should be done at about 6 months postoperatively as a baseline and treatment for I.H.D. should not be stopped after CABG unless silent ischemia has been ruled out