Impact of Age on the Results of Coronary Artery Bypass Grafting

Abstract

As the average age of patients undergoing cardiac surgery is increasing, the effects of age on the incidence of postoperative complications and 30-day mortality after coronary artery bypass grafting were examined. The EuroSCORE and corresponding age-stripped EuroSCORE were calculated in 6,057 patients who underwent isolated coronary bypass between January 1996 and January 2002. Both EuroSCORE and age-stripped EuroSCORE exhibited a significant increase with age in the whole group of patients and in those who were alive 30 days after surgery. The 30-day mortality and the incidence of postoperative complications increased significantly with age. A significant age-dependent increase in EuroSCORE was found in patients who died within 30 days postoperatively, whereas no age dependence was observed in the age-stripped EuroSCORE. Univariate analysis showed diabetes mellitus and atrial fibrillation to be significant risk factors for 30-day mortality; atrial fibrillation was also found to significantly affect 30-day mortality on multivariate analysis. In view of the increasing co-morbidity and age-dependent organ changes in the elderly, specific preventive and therapeutic measures are needed in this group of patients undergoing cardiac surgery.