ArticleHeart rhythm O22026
Single or multiple pulsed field applications: Intracardiac electrogram changes and implications for procedural end points.
Article in Heart rhythm O2, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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13 authors.
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Abstract
Background: Pulsed field ablation (PFA) using a pentaspline catheter is increasingly applied for pulmonary vein (PV) isolation, but standardized methods to assess durable lesion formation are lacking. Objective: We aimed to investigate the impact of incremental PFA applications on electrogram (EGM) characteristics and determine whether EGM signatures serve as markers for effective lesions. Methods: PV EGMs of a cohort of consecutive patients were analyzed before and after single, double, and quadruple PFA applications. Bipolar voltage amplitude (BVA) and signal power in different frequency bands (>50 Hz, >75 Hz, and >125 Hz [HF125]) were quantified. EGMs were reassessed after 60 seconds, and pacing was performed to evaluate PV pace capture. Results: This analysis included 4230 EGMs of 83 patients. Immediately after ablation, no differences in BVA and frequency power were observed between groups. After 60 seconds, significant differences were present for all features in the single, double, and quadruple groups: BVA (0.27 mV vs 0.26 mV vs 0.13 mV), >50 Hz (39 μV Conclusion: Only quadruple PFA applications ensured persistent lesion effects over the observation period. A combined end point using an HF125 cutoff of 2.5 μV
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