Analysis of immediate results of on-pump versus off-pump coronary artery bypass grafting surgery.

OBJECTIVE The objective of this study is to compare the immediate results of patients undergoing on-pump versus off-pump coronary artery bypass graft (CABG) surgery. METHODS From January 2007 to January 2009, 177 patients underwent CABG, being 92 off-pump and 85 on-pump. We evaluated the demographics, preoperative risk factors, preoperative functional class and risk assessment by the EuroSCORE. The postoperative evolution was compared between groups. RESULTS The mean number of grafts per patient was 2.48 ± 0.43 in off-pump group and 2.90 ± 0.59 in on-pump group. In the off-pump group, 97.8% of patients received an internal thoracic artery graft, while on-pump group the percentage was 94.1% (P = 0.03). The rate of complete revascularization was similar in both groups. In off-pump group, the circumflex artery was revascularized in 48.9% and 68.2% in the on-pump group (P = 0.01). Hospital mortality was 4.3% and 4.7%, respectively in the off-pump group in the on-pump group (P = 0.92). Off-pump group had fewer complications in relation to perioperative myocardial infarction (P = 0.02) and use of intra-aortic balloon pump (P = 0.01). CONCLUSION The off-pump CABG is a safe procedure with hospital mortality similar to that observed in on-pump CABG, with lower rates of complications and less need for intra-aortic balloon.