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International Journal of Medical Research & Health Sciences (IJMRHS)
ISSN: 2319-5886 Indexed in: ESCI (Thomson Reuters)

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Abstract

Predicting Postoperative Atrial Fibrillation using CHA2DS2-VASC Score: A Retrospective Observational Study

Author(s):Lama Alfehaid, Hind Almodaimegh , Abdullah Aljohani, Sultan Zurnyq, Mohammed Alessa and Abdullah A. Alghamdi

Objective: Postoperative atrial fibrillation (POAF) is an arrhythmia most commonly seen after cardiac surgery. Its association with increased mortality, cost and adverse events has made it crucial to identify those at risk and to prevent POAF through preoperative therapy. In order to do that, we have studied the utilization and predictive power of the CHA2DS2-VASc score, and the relationship between other factors such as preoperative medications and patient clinical characteristics. Methods: A retrospective observational study was conducted by reviewing medical charts for patients who underwent coronary arteries bypass grafting (CABG) with or without aortic valve replacement or mitral valve/tricuspid valve repair and aged >18 years. Patients with a preoperative history of atrial fibrillation (AF) or flutter, patients with a pacemaker, patients with prior antiarrhythmic drugs use within the last 6 months, patients who underwent MAZE procedures, or patients with mechanical mitral valve were excluded. Results: At a cut-off score of ≥ 2 the CHA2DS2-VASc showed a 96.8% sensitivity and 23.1% specificity for predicting POAF. It also showed an increased risk at higher scores, a score of at least 3 significantly predicted the occurrence of events (p<0.000). Age, male gender, high BMI were significant predictors of POAF (p<0.001, p<0.05, p<0.001). Patients who received statins preoperatively were at significant lower risk (p<0.001). Conclusion: The CHA2DS2-VASc score is a strong predictor of adverse events postoperatively.


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