“…Duration of the operation, type of grafting used, reexploration for bleeding, intraoperative complications, inability to wean patients off respirators, need for inotropic drugs and blood transfusions, and development of wound infections have all been shown to be associated with mortality after CABG. [19][20][21][22][23] In a previous report we suggested that not all complications during the operation and the perioperative period could be attributed to patient inherent risk at the time of the operation. 15 Furthermore, the sequential addition of the operative and postoperative factors to the case-mix characteristics suggested an independent effect of these factors on mortality.…”