The complete revascularization , postoperative drainage loss , intra-aortic balloon pump support , blood requirements , postoperative myocardial infarction , pulmonary complications , gastrointestinal complications , inotropic requirements > 24 hours , ventilation > 24 hours , intensive care unit stay > 24 hours , and in-hospital stay > 7 days were significantly lower in the OPCAB group than in the other 2 groups ( P < .05 ) .