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Re-definition of Blanking Period in Radiofrequency Catheter Ablation of Atrial Fibrillation in the Contact Force Era
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  • Shunsuke Uetake,
  • Yasushi Miyauchi,
  • Tatsuya Mitsuishi,
  • Mitsunori Maruyama,
  • Seino Yoshihiko,
  • Wataru Shimizu
Shunsuke Uetake
Nippon Medical School Chiba Hokusoh Hospital
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Yasushi Miyauchi
Nippon Medical School Chiba-Hokusoh Hospital
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Tatsuya Mitsuishi
Nippon Medical School Chiba Hokusoh Hospital
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Mitsunori Maruyama
Nippon Medical School Musashi-Kosugi Hospital
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Seino Yoshihiko
Nippon Medical School Chiba Hokusoh Hospital
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Wataru Shimizu
Nippon Medical School
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Abstract

Introduction: Early recurrence (ER) of atrial fibrillation (AF) is defined as the recurrence of atrial tachyarrhythmias within 3 months after AF ablation, however, this definition is based on data from the era of radiofrequency catheter ablation (RFCA), without contact force (CF) technology. We investigated the significance of ER as a risk factor for late recurrence (LR) in paroxysmal AF (PAF) patients treated with CF and non-CF-guided ablation. Methods and Results: We studied 395 patients with PAF who underwent RFCA. Of these, 97 patients underwent RFCA without CF technology (Non-CF group) and 298 underwent with CF technology (CF group). Over a 2-year post-ablation follow-up period, LR occurred in 54 of 97 (55.7%) patients in the Non-CF group, and in 105 of 298 (35.2%) patients in the CF group. ER had a more significant relationship with LR in the CF than in the Non-CF group, and all patients in the CF group with ER in the 3rd month developed LR. Conclusion: ER in PAF patients who have undergone CF-guided ablation have a greater risk of LR than those who have undergone non-CF-guided ablation. ER in the 3rd month after CF-guided ablation may indicate an absolute risk of LR. Blanking period could be defined as 2 months in the CF era.

Peer review status:Published

05 May 2020Submitted to Journal of Cardiovascular Electrophysiology
05 May 2020Submission Checks Completed
05 May 2020Assigned to Editor
06 May 2020Reviewer(s) Assigned
20 May 2020Review(s) Completed, Editorial Evaluation Pending
20 May 2020Editorial Decision: Revise Minor
24 Jun 20201st Revision Received
25 Jun 2020Submission Checks Completed
25 Jun 2020Assigned to Editor
25 Jun 2020Reviewer(s) Assigned
25 Jun 2020Review(s) Completed, Editorial Evaluation Pending
26 Jun 2020Editorial Decision: Accept
08 Jul 2020Published in Journal of Cardiovascular Electrophysiology. 10.1111/jce.14643