On-pump versus off-pump coronary artery bypass grafting with left internal mammary artery for left anterior descending artery stenosis: a retrospective study over 15 years

Résumé 0

Backrounds The on-pump surgery might induce a higher number of postoperative complications because of the extra-corporal circulation (ECC) that is not a physiological process. Many studies have been done for over ten years to demonstrate the benefits of the off-pump surgery over the on-pump one. To date the results are still controversial. Objectives The goal of this study was to compare intraoperative characteristics and 30-day postoperative outcomes of both surgical methods. Methods Two hundred forty-three (243) patients operated under off-pump or on-pump CABG (coronary artery bypass grafting) with the left internal thoracic artery (LITA) anastomosed to the left anterior descending (LAD) coronary artery were included retrospectively in this study. We incorporated in our study operations performed from July 1997 to December 2012 in three Swiss hospitals by a single surgical team. Statistical analysis of preoperative, intraoperative and postoperative (30 days) patient characteristics were then proceeded. Results Overall patients who underwent off-pump surgery were more often men (81.5% vs 66.1%, p=0.006), were significantly older (median age 67 years old vs 64, p=0.013), had more renal failure (10.9% vs 2.4%, p=0.009) and respiratory failure (20.2% vs 7.3%, p=0.003), had more arteriopathy (16.8% vs 8.1%, p=0.038) and were affected by higher degrees of angina (p