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