The aim of this study was to determine whether aortic knob width (AKW) was related to the development of postoperative atrial fibrillation (AF) in patients undergoing off-pump coronary artery bypass grafting (CABG). Between July 2017 and June 2019, a total of 453 patients undergoing isolated off-pump CABG were enrolled to this retrospective observational cohort study. The patients were divided into two groups; as AF group (n=102) and non-AF group (n=351). The groups were compared with regard to preoperative demographics and clinical characteristics, intraoperative data, and postoperative outcomes, and then a multivariate logistic regression analysis was performed in order to determine the independent predictors of postoperative AF. The incidence of postoperative AF in our study population was found as 22.5% (n=102/453). The median age and AKW, and the frequencies of hypertension and chronic renal dysfunction were significantly higher in patients in AF group than in non-AF group. Multivariate logistic regression analysis revealed that age and AKW were the independent predictors of postoperative AF. The analysis yielded that the risk of POAF development increased by 5.2% with each one-year increase in patient age [OR 1.0520 with 95% CI= (1.0214, 1.0835), p
Key words: Aortic knob width, predictor, atrial fibrillation, off-pump coronary artery bypass grafting
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