Abstract:Objective To investigate the risk factors and possible predictors of postoperative atrial fibrillation (POAF) in patients received off-pump coronary artery bypass grafting (OPCABG). Methods The clinical data of 126 patients received OPCABG in Zhongda Hospital Southeast University from January 2018 to June 2020 were collected and analyzed retrospectively. There were 28 patients in POAF group and 98 patients in control group (without POAF). The binary logistic regression was used to analyze the risk factors of postoperative atrial fibrillation. Results There were significant differences in age, operation time, intraoperative blood transfusion, left atrial diameter (LA), left ventricular ejection fraction(LVEF), history of hypertension, preoperative CRP, preoperative and postoperative troponin and B-type natriuretic peptide (BNP) levels between two groups （P＜0.05）. Logistic regression analysis showed that older age (OR=1.126), increased LA (OR=1.975), preoperative higher levels of BNP(OR=1.841) and CRP (OR=1.861) and history of hypertension (OR=2.911) were the risk factors for postoperative atrial fibrillation in patients with coronary artery bypass grafting（P＜0.05）. Conclusion For the patients undergoing OPCABG, the risk of POAF may be higher in the patients with advanced age, history of hypertension, increased LA and preoperative high BNP and CRP levels, and corresponding preventive measures should be taken effectively.