Preoperative Level of Hemoglobin A1c and Acute Kindey Injury After Coronary Artery Bypass Grafting Surgery

Inclusion Criteria: * ASA physical status II-III * scheduled to undergo isolated coronary artery bypass grafting Exclusion Criteria: * Patients with history of renal failure * Patients with history of hepatic failure * Patients with history of heart failure * previous cardiac surgery * cerebrovascular event in the last 30 days * percutaneous coronary intervention in the last 30 days prior to operation * peripheral arterial disease * malignancy * infectious diseases * patients who required surgical revision * patients who required postoperative intra-aortic balloon pump * patients with CBP time \> 120 min or aortic cross clamp time \> 90 min