Catheter Ablation -> Atrial Fibrillation & Atrial Flutter: -> Clinical Trials / Outcomes D-PO04 - Poster Session IV (ID 15) Poster

D-PO04-136 - Characterization Of Drivers Maintaining Long-lasting Atrial Fibrillation: New Insight From The Distribution And Spatiotemporal Stability (ID 457)

Disclosure
 T. Chang: Nothing relevant to disclose.

Abstract

Background: Characteristics of AF drivers maintaining persistent AF are associated with mechanical importance. We evaluated the regional distribution and spatiotemporal stability of the potential AF drivers before ablation, including the periodicity(PI), similarity index(SI), divergent force(Div),and phase singularityindex(PS).
Objective: 29 consecutive patients with persistent AF receiving catheter ablation were enrolled.
Methods: Patients were mapped with the CARTOFINDER™ system (Carto® 3 system Version 7& Version 6 UDM ) with the PentaRay NAV catheter(Biosense Webster) catheter to identify drivers with either focal or rotational activities before ablation. We evaluated the regional distribution and spatiotemporal stability of the potential AF drivers before ablation, including the periodicity(PI), similarity index(SI), divergent force(Div),and phase singularityindex(PS)
Results: The characteristics of patients were demonstrated. There were identified 1320 regions of LA, and 129 regions with drivers (9.3% focal activity, 0.5% rotational activity). Figure showed the prevalence and distribution of activity. The PV/Antral regions were the most common foci for the drivers. The SI and PI of AF driver region was higher than the non-driver. The rotations index was higher in the rotor regions than others.
Conclusion: Compared with the rest of the non-driver regions, driver sites correlated with the spatiotemporal stability of the bipolar electrogram. According to the distribution of the drivers, the importance of pulmonary vein isolation was still emphasized in persist AF patients.
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