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Left Atrial Volume and Post-Operative Atrial Fibrillation after Aortic Valve Replacement

Post-operative atrial fibrillation (POAF) after valve surgery is associated with increased morbidity and mortality. Risk factors identified in the past to predict POAF are of moderate accuracy. We performed a retrospective analysis of 139 patients undergoing aortic valve replacement for aortic stenosis. Post-operative AF occurred in 44% of the patients. In multivariate analysis only left atrial volume (LAV) index was a predictor of POAF. A LAV index of >46 cc/m2 predicted POAF with a sensitivity and specificity of 92% and 77%. We propose that LAV index can be used preoperatively to identify patients at risk for POAF to target preventive interventions.

Credits: Yeruva Madhu Reddy, MD; Ruby Satpathy, MD; Xuedong Shen, MD, PhD; Mark Holmberg, MD, PhD; Claire Hunter, MD; Aryan Mooss, MD; Dennis Esterbrooks, MD

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Introduction to AFib
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