Introduction: Myocardial infarction after coronary artery bypass grafting is a serious complication and one of the most common causes of perioperative morbidity and mortality.
Aim of the study: To determine the incidence of perioperative myocardial infarction and to detect predictors ,in hospital and 30 days clinical outcome related to perioperative myocardial infarction by using hs-TnI and evaluated the utility of adding to the troponin criteria new Q-waves or imaging evidence of new wall motion abnormality as suggested in the Universal Definition of MI.
Methods: The study enrolled 250 consecutive patients undergone isolated CABG at the National Heart Institute,Cairo,Egypt and Benha University hospital ,Benha,Egypt in the period from November 2013 to May 2014 (6 months). Threshold of 700 ng/l (10-times 99th percentile upper reference limit) of hs-TnI was prescribed plus ECG and or Echocrdiographic evidence of new wall motion abnormality.
Results: Perioperative MI was reported in 11% of patients after CABG with worse in hospital and 30 days clinical outcome. The study showed that, Body mass index, prior heart failure , EuroScore , Left main coronary artery stenosis> 50% , lesion type,% diameter stenosis and length , Aortic cross clamping time and Extracorporeal circulatory time were significant independent predictor of perioperativeMI,p