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Efficacy of the Peak Frequency Map for Left Atrial Posterior Wall Isolation
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  • Shintaro Yamagami,
  • Suguru Nishiuchi,
  • Tomohiro Sato,
  • Masaya Akiyama,
  • Yuta Nakano,
  • Hirokazu Kondo,
  • Toshihiro Tamura
Shintaro Yamagami
Koeki Zaidan Hojin Tenri Yorozu Sodanjo Byoin Ikoi no Ie Noshinkei Naika
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Suguru Nishiuchi
Koeki Zaidan Hojin Tenri Yorozu Sodanjo Byoin Ikoi no Ie Noshinkei Naika

Corresponding Author:[email protected]

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Tomohiro Sato
Koeki Zaidan Hojin Tenri Yorozu Sodanjo Byoin Ikoi no Ie Noshinkei Naika
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Masaya Akiyama
Koeki Zaidan Hojin Tenri Yorozu Sodanjo Byoin Ikoi no Ie Noshinkei Naika
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Yuta Nakano
Koeki Zaidan Hojin Tenri Yorozu Sodanjo Byoin Ikoi no Ie Noshinkei Naika
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Hirokazu Kondo
Koeki Zaidan Hojin Tenri Yorozu Sodanjo Byoin Ikoi no Ie Noshinkei Naika
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Toshihiro Tamura
Koeki Zaidan Hojin Tenri Yorozu Sodanjo Byoin Ikoi no Ie Noshinkei Naika
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Abstract

Background and aims: Complete isolation of the left atrial posterior wall (LAPW) is challenging owing to overlapping epicardial conduction. Peak frequency (PF) is a novel parameter that focuses on near- and far-field electrogram components. In this study, we aimed to determine whether transmural block completion is related to the ablation site PF. Methods: We analyzed 44 consecutive patients undergoing initial LAPW isolation between June 2023 and February 2024. Pre-LAPW isolation and PF maps were obtained using an HD-Grid catheter. In 17 of the 44 patients (Group-1), LAPW isolation was performed conventionally. In the remaining 27 patients (Group-2), PF-guided LAPW isolation was applied based on Group-1 results. Results: In Group-1, the left atrial roof and floor line success rates were 58.8% and 76.5%, respectively. The average PF value in the roof lines of patients with a completed block line was significantly higher than that of the remaining patients (286.6 ± 29.3 Hz vs. 236.1 ± 40.9 Hz, p = 0.012), but the floor lines were similar. In Group-2, relatively high PF values were targeted to achieve complete block of the left atrial roof and floor lines, following the results obtained in Group-1. The left atrial roof line success rates (92.6% vs. 58.8%, p = 0.007), total number of radiofrequency applications (22.7 ± 5.6 vs. 27.6 ± 8.5, p = 0.03), and procedural time (32.6 ± 18.3 vs. 47.9 ± 25.6 min, p = 0.03) differed between Group-1 and Group-2. Conclusion: Using a PF map for determining the optimal ablation line for LAPW isolation by radiofrequency catheter ablation is feasible.
Submitted to Journal of Cardiovascular Electrophysiology
Submission Checks Completed
Assigned to Editor
Reviewer(s) Assigned
03 Jul 2024Review(s) Completed, Editorial Evaluation Pending
06 Jul 2024Reviewer(s) Assigned
26 Aug 2024Editorial Decision: Revise Minor
10 Sep 20241st Revision Received
11 Sep 2024Submission Checks Completed
11 Sep 2024Assigned to Editor
11 Sep 2024Review(s) Completed, Editorial Evaluation Pending
14 Sep 2024Reviewer(s) Assigned
03 Oct 2024Editorial Decision: Revise Minor
04 Oct 20242nd Revision Received
09 Oct 2024Submission Checks Completed
09 Oct 2024Assigned to Editor
09 Oct 2024Review(s) Completed, Editorial Evaluation Pending
09 Oct 2024Reviewer(s) Assigned
13 Oct 2024Editorial Decision: Accept