Relationship Between Endothelial Dysfunction and the Outcomes After Atrial Fibrillation Ablation

Background Endothelial dysfunction (ED) is associated with cardiovascular events in patients with atrial fibrillation (AF). However, the utility of ED as a prognostic marker after AF ablation supplementary to the CHA2DS2‐VASc score is unclear. This study aimed to investigate the relationship between ED and 5‐year cardiovascular events in patients undergoing AF ablation. Methods and Results We conducted a prospective cohort study of patients who underwent a first‐time AF ablation and for whom the endothelial function was assessed by the peripheral vascular reactive hyperemia index (RHI) before ablation. We defined ED as an RHI of