Comparison of XXXX signal quality using a novel circular mapping and ablation catheter versus a standard circular mapping catheter.

@entity1 @entity8909 @entity12468 @entity955 @entity4406
PURPOSE: Recently, new catheter technologies have been developed for @entity955 ( @entity955 ) ablation. We investigate the diagnostic accuracy of a circular mapping and pulmonary vein ablation catheter ( @entity8909 ) compared with a standard circular mapping catheter (Orbiter) and the influence of filter settings on signal quality. METHODS: After reconstruction of the left atrium by three-dimensional atriography, baseline @entity4406 potentials ( @entity12468 ) were recorded consecutively with @entity8909 and Orbiter in 20 @entity1 with paroxysmal @entity955 . PVPs were compared and attributed to predefined anatomical @entity4406 segments. Ablation was performed in 80 PVs using the @entity8909 . If isolation of the PVs was assumed, signal assessment of each @entity4406 was repeated with the Orbiter. If residual @entity4406 potentials could be uncovered, different filter settings were tested to improve mapping quality of the @entity8909 . Ablation was continued until complete @entity4406 isolation (PVI) was confirmed with the Orbiter. RESULTS: Baseline mapping demonstrated a good correlation between the Orbiter and @entity8909 . Mapping accuracy using the @entity8909 for mapping and ablation was 94% (74 of 79 PVs). Additional mapping with the Orbiter improved the @entity4406 isolation rate to 99%. Adjustment of filter settings failed to improve quality of the @entity4406 signals compared with standard filter settings. CONCLUSIONS: Using the @entity8909 as a stand-alone strategy for mapping and ablation, one should be aware that in some cases, different signal morphology mimics PVI isolation. Adjustment of filter settings failed to improve signal quality. The use of an additional mapping catheter is recommended to become familiar with the particular signal morphology during the first @entity8909 cases or whenever there is a doubt about successful isolation of the pulmonary veins.
