Circulation Journal
Online ISSN : 1347-4820
Print ISSN : 1346-9843
ISSN-L : 1346-9843
Catheter Ablation
Novel Radiofrequency Balloon Catheter　― Impact of Ablation Parameters on Single-Shot Isolation ―
Ilaria My , Stefano Bordignon, Mahi Butt, Laura Rottner, Lemoine Marc, Fabian Moser, Jan-Per Wenzel, Julius Obergassel, Ruben Schleberger, Julia Moser, Leon Dinshaw, Paulus Kirchhof, Bruno Reissmann, Feifan Ouyang, Kyoung-Ryul Julian Chun, Boris Schmidt, Andreas Rillig, Andreas Metzner
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Keywords: Atrial fibrillation, Pulmonary vein isolation, Radiofrequency balloon, Single-shot isolation
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2023 Volume 87 Issue 7 Pages 950-956

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Abstract

Background: A novel multielectrode radiofrequency balloon (RFB) catheter has been released for pulmonary vein isolation (PVI).

Methods and Results: In this observational study consecutive patients with drug-refractory paroxysmal or persistent atrial fibrillation (AF) undergoing first-time PVI were enrolled in 2 high-volume ablation centers. All procedures were conducted in conjunction with a 3D-mapping system. Clinical, procedural and ablation parameters were systematically analyzed. 105 patients (58% male; 52% paroxysmal AF, 68±11.3 years mean age, left atrial volume index 38.6±14.8 mL/m2) were included. 241/412 (58.5%) PVs were successfully isolated with a single shot (SS), with a time-to-isolation of 11.6±8 s. Total number of radiofrequency applications was 892 (mean 2.2/PV), resulting in successful isolation of 408/412 (99%) PVs at the end of the procedure. Mean electrodes’ impedance drop was significantly higher in the SS-PVI compared with non-SS applications (21.5±6.6 vs. 18.6±6.5 Ohm). Concordantly, higher temperature rise was observed in the SS vs. non-SS applications (10.9±4.9℃ vs. 9.6±4.7℃).

Conclusions: In this multicenter real-world study, mean impedance drop and temperature rise were associated with successful SS-PVI applying the novel RFB catheter. These parameters may help to guide efficient usage of the new RF balloon.

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© 2023, THE JAPANESE CIRCULATION SOCIETY

This article is licensed under a Creative Commons [Attribution-NonCommercial-NoDerivatives 4.0 International] license.
https://creativecommons.org/licenses/by-nc-nd/4.0/
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Japanese Circulation Journal

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