Electrophysiological Substrate and Pulmonary Vein Reconnection Patterns in Recurrent Atrial Fibrillation: Comparing Thermal Strategies in Patients Undergoing Redo Ablation.

ABSTRACT: The influence of the initial ablation modality on pulmonary vein (PV) reconnection and substrate characteristics in redo procedures for recurrent atrial fibrillation (AF) remains unclear. We assessed how different thermal strategies-ablation index (AI)-guided radiofrequency (RF) versus cryoballoon (CB) ablation-affect remapping findings during redo pulmonary vein isolation (PVI). We included patients undergoing redo ablation between 2015 and 2024 with high-density electroanatomic mapping. Initial PVI modalities were retrospectively classified as low-power, long-duration (LPLD) RF; high-power, short-duration (HPSD) RF; or second-/third-generation CB. Reconnection sites were mapped using multielectrode catheters. Redo PVI was performed using AI-guided RF. Segments showing PV reconnection wer

SUBMITTER: Kassa KI 

PROVIDER: S-EPMC12386683 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature