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The advantage of mini electrode-equipped catheter for the radiofrequency ablation of paroxysmal supraventricular tachycardia
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  • Young Choi,
  • Sung-Hwan Kim,
  • Hwajung Kim,
  • JEONG-WOOK PARK,
  • Young Woong Ha,
  • You Mi Hwang,
  • kim jihoon,
  • Sung-Won Jang,
  • Yong-Seog Oh
Young Choi
Catholic University of Korea School of Medicine Department of Internal Medicine

Corresponding Author:superstar@catholic.ac.kr

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Sung-Hwan Kim
Catholic University of Korea School of Medicine Department of Internal Medicine
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Hwajung Kim
Catholic University of Korea School of Medicine Department of Internal Medicine
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JEONG-WOOK PARK
Catholic University of Korea School of Medicine Department of Internal Medicine
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Young Woong Ha
Catholic University of Korea School of Medicine Department of Internal Medicine
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You Mi Hwang
Cardiovascular Research Institute for Intractable Disease College of Medicine The Catholic University of Korea Seoul Korea
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kim jihoon
Cardiovascular Research Institute for Intractable Disease College of Medicine The Catholic University of Korea Seoul Korea
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Sung-Won Jang
Cardiovascular Research Institute for Intractable Disease College of Medicine The Catholic University of Korea Seoul Korea
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Yong-Seog Oh
Catholic University of Korea School of Medicine Department of Internal Medicine
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Abstract

Introduction: Novel ablation catheters equipped with mini-electrodes (ME) offer high resolution mapping for target tissue. This study aimed to evaluate the mapping performance and efficacy of ME catheters in radiofrequency ablation of paroxysmal supraventricular tachycardias (PSVTs). Methods: We prospectively enrolled 136 patients who were undergoing catheter ablation of PSVT including 76 patients with atrioventricular nodal reentrant tachycardia (AVNRT) and 60 patients with atrioventricular reentrant tachycardia (AVRT) or Wolff-Parkinson-White (WPW) syndrome. Patients were randomized to the ME group (ablation using a 4.5mm tip ME catheter) or the control group (ablation using a conventional 4mm tip catheter). The number of ablation attempt and cumulative ablation time to ablation endpoints, which was defined as an emergence of junctional rhythm in AVNRT or accessory pathway (AP) block in AVRT/WPW syndrome were compared. Results: During ablation procedures, discrete SP or AP electrograms were found in 27 (39.7%) patients in the ME group and 13 (19.1%) patients in the control group. The primary study outcomes were significantly lower in the ME group (ablation attempt number: 2.0 [1–4] vs. 3.0 [2–7] in the ME and control group, p=0.032; ablation time: 23.5 [5.0–111.5] vs. 64.5 [16.0–185.0] seconds, p=0.013). According to the PSVT diagnosis, ablation time to junctional rhythm was significantly shorter in the ME group in AVNRT. In AVRT/WPW syndrome, both ablation attempt number and ablation time to AP block showed trends favoring the ME group. Conclusion: The novel ME catheter was advantageous for identifying pathway potentials and reducing initial ablation attempt number and time in PSVT ablation. (ClinicalTrials.gov number, NCT04215640)
19 Apr 2022Submitted to Journal of Cardiovascular Electrophysiology
19 Apr 2022Submission Checks Completed
19 Apr 2022Assigned to Editor
19 Apr 2022Reviewer(s) Assigned
09 May 2022Review(s) Completed, Editorial Evaluation Pending
11 May 2022Editorial Decision: Revise Minor
25 May 20221st Revision Received
27 May 2022Submission Checks Completed
27 May 2022Assigned to Editor
27 May 2022Reviewer(s) Assigned
01 Jun 2022Review(s) Completed, Editorial Evaluation Pending
05 Jun 2022Editorial Decision: Accept
Oct 2022Published in Journal of Cardiovascular Electrophysiology volume 33 issue 10 on pages 2164-2171. 10.1111/jce.15639