Relationship Between Endothelial Dysfunction and the Outcomes After Atrial Fibrillation Ablation

Area of Science:

• Cardiology
• Vascular Biology
• Medical Diagnostics

Background:

• Endothelial dysfunction (ED) is linked to cardiovascular events in atrial fibrillation (AF) patients.
• The prognostic value of ED after AF ablation, beyond the CHA₂DS₂-VASc score, requires further investigation.

Purpose of the Study:

• To assess the association between endothelial dysfunction (ED) and 5-year cardiovascular events in patients undergoing AF ablation.
• To determine if ED is an independent predictor of cardiovascular events post-ablation.

Main Methods:

• Prospective cohort study of 1040 patients undergoing first-time AF ablation.
• Endothelial function assessed via peripheral vascular reactive hyperemia index (RHI); ED defined as RHI < 2.1.
• 5-year incidence of cardiovascular events (stroke, heart failure, etc.) compared between patients with and without ED.

Main Results:

• High prevalence of ED (79.7%) observed in the study population.
• Patients with ED had a significantly higher 5-year incidence of cardiovascular events (11.8% vs 6.2%).
• ED independently predicted cardiovascular events (HR 1.91), alongside a CHA₂DS₂-VASc score ≥2.

Conclusions:

• Endothelial dysfunction is highly prevalent in AF patients undergoing ablation.
• Assessing endothelial function provides valuable risk stratification for cardiovascular events after AF ablation.
• ED assessment can enhance prognostic accuracy beyond traditional risk scores.