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 |
