 Hyperglycemia is commonly encountered following cardiac surgery, whether a patient has a history of diabetes or not. Hyperglycemia has been associated with increased perioperative morbidity and mortality; several studies have demonstrated that glycemic control utilizing insulin protocols improves operative mortality, lowers operative morbidity mediastinitis, atrial fibrillation, and improves long-term survival. However, the optimal target for serum glucose has not been established in post-CABG patients. 