The median pre-operative creatinine in group I and group II were 1.2 and 1.1 (P= 0.299), respectively, which is not statistically significant (Table 2). None of the patients in both groups had cerebrovascular disease, peripheral vascular disease, prior Myocardial Infarction (MI), congestive heart failure, liver disease, chronic lung disease, prior cardiac surgery or PCI, preoperative aspirin administration, preoperative clopidogrel administration, or preoperative dual-antiplatelets administration.