Stage-Dependent Diastolic Recovery and Reverse Remodeling After Atrial Fibrillation Ablation Across the Spectrum of...

Area of Science:

• Cardiology
• Electrophysiology
• Cardiac Imaging

Background:

• Atrial fibrillation (AF) frequently coexists with left ventricular diastolic dysfunction (LVDD).
• The impact of AF catheter ablation on varying stages of LVDD remains incompletely understood.
• Assessing AF ablation's effects across the LVDD spectrum is crucial for patient management.

Purpose of the Study:

• To quantify the effects of AF catheter ablation on left ventricular (LV) diastolic function.
• To evaluate changes in LV remodeling following AF ablation across different LVDD grades.
• To determine the relationship between LVDD stage and rhythm outcomes post-ablation.

Main Methods:

• A prospective study of 182 patients undergoing AF ablation, categorized by LVDD grade (none, grade 1, grades 2-3).
• Serial echocardiography performed at baseline and up to 12 months to assess diastolic indices and LV remodeling.
• Statistical analysis using generalized estimating equations and a 6-month landmark analysis to correlate LVDD trajectory with AF recurrence.

Main Results:

• Patients with advanced LVDD (Group C) showed sustained improvement in LVDD grade and diastolic function (E/e'), with significant left atrial and concentric remodeling.
• Patients with grade 1 LVDD (Group B) had some diastolic index improvements but no consistent LVDD downgrading.
• No significant difference in AF recurrence among groups, but sustained LVDD improvement in Group C correlated with lower recurrence.

Conclusions:

• AF catheter ablation demonstrates stage-dependent effects on LV diastolic function and remodeling.
• Advanced LVDD benefits significantly from AF ablation, potentially expanding its indication.
• Integrating LVDD stage and its progression into patient evaluation can refine prognosis and follow-up strategies.