2017 Volume 55Annual Issue 4PM-Abstract Pages 331
Background: Modulation of atrial fibrillation (AF) drivers after pulmonary-vein-isolation (PVI) has been proposed as one of the effective ablation strategies for non-paroxysmal AF (Non-PAF). However, the effectiveness is still controversial because optimal method for detecting AF drivers is unsolved. Methods: We developed an in silico and AI-integrated online real-time phase mapping system called "ExTRa Mapping" to quickly visualize AF wave dynamics. We applied the system to 24 Non-PAF patients and calculated non-passively activated period-to-recording time ratio (%NP). Results: ExTRa Mapping was not conducted in 8 patients because no AF was induced after PVI. In remaining 16 patients, ExTRa Mapping uncovered the non-passively activated areas (NPA) assumed to contain AF drivers. Acute effectiveness of the ExTRa Mapping-guided NPA (ExTRa-NPA) ablation was confirmed by %NP decrease; 65±12% to 36±20%. Non-recurrence rate of the ExTRa-NPA ablation was 81% for 7.7±4.0 months. Conclusion: ExTRa-NPA ablation might improve the long-term outcome of the Non-PAF ablation.
