Significant advancements have been made in the technology and approach to catheter ablation of atrial fibrillation (AF). Pulmonary vein isolation has emerged as the predominate strategy in this procedure and has fueled innovations in catheter design as well as various mapping and navigation systems. Mapping and targeting of complex fractionated atrial electrograms has also emerged as an additional or alternate strategy employed by some ablationists. Recently, attention is being drawn to a new approach targeting atrial sites with high dominant frequencies (DF) derived from their electrograms. This article is a review of the basic concepts of DF, some of the literature on which these were based, and the potential clinical applicability of DF analysis for ablation of AF.
Credits: Rakesh Latchamsetty, MD; Abraham G Kocheril, MD