Evaluation of accuracy of Euroscore risk model in prediction of perioperative mortality after coronary bypass graft surgery in Isfahan

Background: this study aimed to evaluate the accuracy of euroscore (european system for cardiac operative risk evaluation) in predicting perioperative mortality after cardiac surgery in iranian patient population. methods: data on 1362 patients undergoing coronary bypass graft surgery (cabg) from 2007 to 2009 were collected. calibration was assessed by hosmer-lemeshow goodness-of-fit. area under the curve (auc) was used to assess score validity. odds ratios were measured to evaluate the predictive value of each risk factor on mortality rate. results: the overall perioperative in hospital mortality was 3.6% whereas the euroscore predicted a mortality of 3.96%. euroscore model fitted well in the validation databases. the mean auc was 66%. mean length of intensive care unit (icu) stay was 2.5 ± 2.5 days. among risk factors, only left ventricular dysfunction, age and neurologic dysfunction were found to be related to mortality rate. conclusions: euroscore did not have acceptable discriminatory ability in perioperative in hospital mortality in iranian patients. it seems that development of a local mortality risk scores corresponding to our patients epidemiologic charac- teristics may improve prediction of outcome.