Without PS matching, the two groups showed significant differences in age, BMI, sex, ASA PS, smoking history, operator, surgical strategy, DM, HTN, IHD, pulmonary disease, clopidogrel, HMG-CoA reductase, NSAIDs, selective COX-2 inhibitor, CRP, AST, albumin, and echocardiographic/PFT findings. This evidence concerns the gene HMGCR and myocardial ischemia.