A-12 lead electrocardiogram (ECG) was performed pre-operatively, in the intensive care unit (ICU) and upon patient transfer to the ward. The appearance of new Q-waves indicating myocardial infarction (MI) or incidence of any arrhythmias was reported. Echocardiography was performed pre-operatively and post-operatively after ICU discharge to detect any new wall movement abnormalities as well.