• Seyedeh Hamideh Mortazavi, Alireza Oraii, Hamidreza Goodarzynejad, Peyvand Bina, Arash Jalali, Seyed Hossein Ahmadi Tafti, Jamshid Bagheri, and Saeed Sadeghian.
• Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran.
• J. Cardiothorac. Vasc. Anesth. 2022 May 1; 36 (5): 1304-1309.

ObjectiveThe authors aimed to investigate the role of CHA2DS2-VASc score and its components in prediction of postoperative atrial fibrillation (POAF) after isolated coronary artery bypass graft (CABG) surgery.DesignRetrospective cohort.SettingSingle-center university-affiliated tertiary cardiac center.ParticipantsA total of 2,981 consecutive patients who underwent isolated CABG between 2010 and 2012 were included.InterventionsAll patients underwent isolated CABG and were followed until discharge or in-hospital death. The primary outcome was the development of new-onset POAF during the hospital course.Measurements And Main ResultsDuring hospitalization, continuous electrocardiogram monitoring was used to detect POAF episodes. New-onset POAF developed in 15.8% of patients following isolated CABG. Patients with POAF had significantly higher CHA2DS2-VASc scores than those without POAF (2.66 ± 1.51 v 2.12 ± 1.36, p < 0.001). After adjustment for potential confounders, CHA2DS2-VASc score was significantly associated with POAF (odds ratio [OR]: 1.295, 95% CI: 1.205-1.391). However, further analyses showed that this effect was restricted to patients with a CHA2DS2-VASc score of ≥2 (OR: 1.813, 95% CI: 1.220-2.694). In multivariate analysis of the CHA2DS2-VASc components, age ≥75 (OR: 3.737, 95% CI: 2.702-5.168), age 65 to 74 (OR: 2.126, 1.701-2.658), hypertension (OR: 1.310, 95% CI: 1.051-1.633), and cerebrovascular accident (OR: 1.807, 95% CI: 1.197-2.726) were independent predictors of POAF. However, the association between POAF and female sex, diabetes mellitus, congestive heart failure, and vascular disease was not statistically significant.ConclusionsCHA2DS2-VASc score is a useful tool for the prediction of POAF after isolated CABG. However, the risk should be interpreted cautiously, since the risk score's promising effect relies on only several of its components.Copyright © 2021 Elsevier Inc. All rights reserved.

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