Risk factors of postoperative atrial fibrillation in patients undergoing beating heart coronary artery bypass

Aim: This study aims to establish new-onset atrial fibrillation (AF) risk factors and postoperative outcomes after off-pump coronary artery bypass graft (CABG) surgery. Material and Methods: Four hundred ninety patients who underwent off-pump CABG were enclosed in study. Patients divided into two groups in line with the development of new-onset AF as AF group (n=62) and non-AF group (n=428). Groups were compared in terms of preoperative clinical features and perioperative data, and multivariate analysis accomplished to identify independent clinical predictors of AF following off-pump CABG. Results: AF was presented in 62 (12.7%) of the patients, and those were significantly older and had significantly higher additive EuroSCORE scores than without AF. Also patients with postoperative AF had significantly prolonged intensive care unit and longer hospital stays at postoperative period. In the multivariant logistic regression analysis performed, advanced age, mean Euroscore, Mild to moderate mitral regurgitation, Prolonged air leak from thorax drain, mean ventilation time, severe pleural effusion, need for inotropic drug support were found to be risk factors for postoperative AF. Conclusion: Our study showed that age, high Euroscore, mild to moderate mitral regurgitation, prolonged ventilation time, severe pleural effusion and low cardiac output were risk factors of postoperative AF in patients underwent off-pump CABG. Also In patients who developed postoperative AF, prolonged intensive care unit and hospital stays were observed. Prospective randomized studies with larger patient series are recommended to support our study.