Abstract 11072: Atrial Fibrillation in Coronary Artery Bypass Surgery is Associated with Increased Mortality
Background: Atrial fibrillation (A-fib) is an increasingly prevalent disorder, and is associated with increased risk of mortality in patients with myocardial infarction. The prognostic significance of A-fib in patients undergoing coronary artery bypass surgery (CABG) is not known. The purpose of this study is to evaluate the prognostic significance of A-fib in patients undergoing CABG.
Methods: This case-control study consists of 744 CABG Veterans with and without A-fib. VA electronic medical records from veterans were used to evaluate the presence or absence of CABG, A-fib and risk factors. Cox regression survival analysis was employed to assess the association of A-fib in CABG with mortality.
Results: The mean age of population was 65±8 years and 100% were male. During the mean follow-up of 8±2 years, the event free survival rate was 85.6% in CABG patients without A-fib and 76.4% in CABG patients without A-fib (p<0.01). After adjustment for conventional risk factors, hazard ratio of death was 1.93 (95%CI 1.31 - 2.83, p=0.001) for CABG patients with A-fib as compared to those without A-fib.
Conclusion: The current study reveals that A-fib is an independent risk factor for long-term event free survival rate in patients undergoing CABG.
- © 2011 by American Heart Association, Inc.