This study evaluated outcomes of 1095 patients who underwent off-pump coronary artery bypass surgery at Bangkok Heart Hospital between 2003-2008. 170 patients (15.5%) developed atrial fibrillation post-operatively. The study found no significant differences in pre-operative characteristics or operative details between those who did and did not develop atrial fibrillation. However, patients who developed atrial fibrillation tended to be older, have a higher rate of congestive heart failure and prior percutaneous coronary intervention, and a longer hospital stay. Developing atrial fibrillation also increased risks of post-operative pneumonia, renal failure, and dialysis requirement.

1. Atrial Fibrillation and Off - pump coronary artery bypass surgery in our experience.
C. Suwanakijboriharn, V. Pitiguagool, S. Banyatpiyaphod, V. Jotisakulratana, P.
Pamornsing, S. Asavapiyanond., P. Ruengsakulrach, C. Vatcharasiritham, K. Arom
Division of Cardiovascular Surgery, Bangkok Heart Hospital, Bangkok, Thailand
Objective:
To evaluate the outcome of off pump coronary artery by pass surgery and to
predict the causes of post operative atrial fibrillation.
Methods:
Between January 1, 2003 and December 31, 2008, 1095 patients underwent
off pump coronary artery bypass surgery, 170 cases (15.5%) developed atrial
fibrillation . We evaluated pre operative status, operative characteristics, and post
operative outcome by using univariate and multivariate analysis.
Results:
Of these two group(AF and non AF), Their were no significant difference
between male and female gender, morbid obesity, pre operative renal failure dialysis
dependent, diabetes millitus, hypertension, cerebro-vascular disease, chronic
obstructive lung disease, peripheral vascular disease, history of myocardial infarction,
pre operative angina , left main lesion (>50%), ejection fraction, LVEEF less than
40% , re do case, emergency surgery, pre op. IABP, operative time, number of graft
per patient, post op.intubation time, re op.bleeding, peri op MI, post operative wound
infection, permanent stroke, operative mortality and conversion rate and 30 days
readmission. In atrial fibrillation group, their were significant older age( 65.9±9.9 vs.
61.6±10.4 years,p=0.0), increase incidence of congestive heart failure(27.1% vs.
17.9%,p=0.001), , prior PCI(10.6% vs. 7.0%,p=0.048), post op. pneumonia(4.1% vs
0.6%,p=0.003), post op. renal failure and dialysis required(2.9% vs.
0.9%,p=0.038).length of stay(13.65±10.43 vs. 10.81±9.58 days,p=0.004) but less
incidence in patient with cardiogenic shock(3.5% vs. 7.2%,p=0.003).
Conclusion:
Old age group( more than 70 year), congestive heart failure , prior PCI, post
op.pneumonia are the predictors of post op. AF is effect on longer hospital stay ith
same mortality.