Revised Cardiac Risk Index for Pre-Operative RiskLoading...Elevated-risk surgeryNo0Yes+1History of ischemic heart diseaseNo0Yes+1History of congestive heart failureNo0Yes+1History cerebrvascular diseaseNo0Yes+1Pre-operative treatment with insulinNo0Yes+1Pre-operative creatinine > 2 g/dl/176.8 umol/LNo0Yes+1