Bipolar endo-epicardial RF ablation: Animal feasibility study.

Background: Bipolar radiofrequency ablation (B-RFA) is a method used to treat the arrhythmia substrate resistant to unipolar ablation. Few studies have addressed endo-epicardial B-RFA.

Objective: The aim of the study was to evaluate chronic lesions resulting from endo-epicardial B-RFA and to determine optimal settings for such procedures in an animal model.

Atrial electrogram amplitude variability during atrial fibrillation ablation.

Introduction: Variability of the bipolar atrial electrogram amplitude may affect voltage maps created during ablation procedures, and thus also the extent of ablations. Therefore, the aim of the study was to assess the beat-to-beat electrogram amplitude variability in the left atrium in patients undergoing atrial fibrillation ablation.

Methods: In 11 patients undergoing ablation for atrial fibrillation, 362 mapping points were collected in two series.