Left Atrial Mechanics and Remodeling in Paroxysmal Atrial Fibrillation: Introducing the EASE Score for Pre-Ablation Risk Prediction.

Background: Paroxysmal atrial fibrillation (PAF) is a common arrhythmia often treated with catheter ablation, particularly pulmonary vein isolation (PVI). However, recurrence remains frequent and is often linked to unrecognized structural and functional remodeling of the left atrium. Methods: We introduce the Echocardiographic Atrial Strain and conduction Evaluation (EASE) score as a theoretical, noninvasive model to stratify recurrence risk in patients undergoing catheter ablation for PAF. The score is based on the hypothesis that integrated echocardiographic parameters can reflect the extent of atrial remodeling relevant to ablation outcomes. Results: The EASE score combines six echocardiographic metrics-left atrial reservoir strain (LASr), atrial conduction time (PA-TDI), left atrial volume index (LAVI), stiffness index (E/e'/LASr), E/e' ratio, and contractile strain (LASct)-each representing structural, electrical, or mechanical remodeling. The total score ranges from 0 to 12, stratifying patients into low, intermediate, and high-risk categories for arrhythmia recurrence. Preliminary retrospective data suggest a significant association between higher EASE scores and increased recurrence rates following ablation. Conclusions: The EASE score offers a biologically plausible, multidimensional framework for noninvasive risk prediction in PAF ablation. Prospective studies are warranted to validate its clinical utility and refine its structure.