O. Risum et al., RISK-FACTORS OF RECURRENT ANGINA-PECTORIS AND OF NONFATAL MYOCARDIAL-INFARCTION AFTER CORONARY-ARTERY BYPASS-SURGERY, European journal of cardio-thoracic surgery, 10(3), 1996, pp. 173-178
The long-term results of 1025 patients, 912 men and 113 women, undergo
ing coronary artery bypass grafting (CABG) at the Cardiovascular Unit
of Rikshospitalet, Oslo, between 1982 and 1986, were analyzed on facto
rs associated with the return of angina pectoris and of non-fatal post
CABG myocardial infarction. The closing date was Ist January 1993, wi
th a mean follow-up time of 7.4 years. Recurrent angina pectoris was e
xperienced by 118 (11.6%) patients and 102 (10%) patients experienced
non-fatal post CABG myocardial infarction during the observation perio
d. Altogether 30 possible risk factors were analyzed. The cumulative i
ncidence of recurrent angina was initially low after operation, follow
ed by a rise after 4 years. One, 5 and 10 years after the operation, s
urvival free from angina rates were 97.8%, 91.8% and 80.6%, respective
ly. The cumulative incidence of post CABG myocardial infarction was al
so low initially, followed by a rise after 4 years, The survival free
of non-fatal post CABG myocadial infarction rate was 98.9%, 96% and 83
.5%, at 1, 5 and 10 years after surgery, respectively. The incremental
risk factor of recurrent angina pectoris was hypertension. The indepe
ndent risk factors of non-fatal post CABG myocardial infarction were h
ypertension and preoperative stenosis of the left-sided, versus right-
sided, coronary arteries. The study emphasizes the favorable effect of
coronary bypass surgery on the functional outcome in patients with sy
mptomatic coronary artery disease.