[Risk factors for operative mortality in 1,098 patients with coronary artery bypass grafting surgery: a single center report].

OBJECTIVE

To analyze the risk factors for operative mortality in 1 098 cases of coronary artery bypass grafting (CABG) procedures.

METHODS

A total of 1 098 cases of CABG including 113 cases of left ventricular ejection fraction (LVEF) lower than 35% from December 1999 through December 2009 were chosen for the retrospective study. Univariate and multivariate stepwise logistic analyses were performed based on the data of the whole group to locate the mortality risk factors.

RESULTS

Age, acute coronary syndrome, emergent surgery, chronic renal failure (CRF), concomitant peripheral vascular disease, LVEF ≤ 35%, left ventricular end diastolic diameter (LVEDD), moderate to severe mitral regurgitation, aneurysm of the heart wall, aortic regurgitation, mitral repair/replacement, resection of aneurysm, concomitant aortic valve replacement, peri-operative intra-aortic balloon pump (IABP), left ventricular assist device (LVAD), and off-pump CABG were the risk factors for the univariate analysis. In the further multivariate regression analysis, off-pump CABG appeared statistically as a protective factor while age, female, emergent surgery, CRF, and the peri-operative application of IABP were the risk factors correspondingly for the whole group.

CONCLUSION

Age, female, emergent surgery, CRF, and the application of IABP, were the risk factors for mortality in the entire group of patients, implicating the necessity of specific and cautious management. CABG concomitant with non-cardiac surgery, concomitant with the treatment of moderate-severe mitral regurgitation and resection of heart wall aneurysm were not the risk factors for peri-operative mortality.