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Analysis of the preferable site and stability of rotational reentry: its role for the maintenance of atrial fibrillation

  • Shozo Kaneko
  • Hiroshige Yamabe
  • Tadashi Hoshiyama
  • Hisanori Kanazawa
  • Miwa Ito
  • Yusuke Kanemaru
  • Takuya Kiyama
  • Kenichi Tsujita
Original Article
  • 36 Downloads

Abstract

It remains unclear whether AF is maintained by rotor. We evaluated the significance of rotor during atrial fibrillation (AF). Prevalence, location, and stability of rotational reentry (RR) in the left atrium were clarified by endocardial non-contact mapping in 66 AF patients. RR was classified into three categories: RR continued at stable site (Stable-RR), RR observed intermittently at the same site (Intermittent-RR), and RR observed at different locations (Different-RR). Catheter ablation was performed in a stepwise fashion (linear roof lesion and complex fractionated atrial electrogram ablation following pulmonary vein isolation) until AF termination and elucidated the consequence of radiofrequency lesion delivered within RR site on AF termination and recurrence. One hundred and nineteen RRs were observed. There were 54 patients with RR (RR Group) and 22 patients without RR (Non-RR Group). Prevalence of Different-RR (n = 81) was significantly higher than Stable-RR (n = 16, p < 0.001) and Intermittent-RR (n = 22, p < 0.001). The intervals involved in RR occupied only 22.4% of total activation time. There was no significant difference in the prevalence of AF termination nor AF/atrial tachycardia recurrence between RR and non-RR Groups (46 vs. 9 patients, p = 0.317, and 13 vs. 1 patients, p = 0.271) and between patients in whom radiofrequency lesion was involved in RR and those was not (24 vs. 22 patients, p = 0.210, and 6 vs. 7 patients, p = 0.506). In conclusion, most RRs were observed transiently and often shifted its locations. Radiofrequency lesion delivered within RR site did not correlate with AF termination nor recurrence, suggesting that RR is not a driving source during AF.

Keywords

Atrial fibrillation Mapping Reentry Rotor 

Notes

Compliance with ethical standards

Conflict of interests

The authors declare that they have no competing interests.

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Copyright information

© Springer Japan KK, part of Springer Nature 2019

Authors and Affiliations

  • Shozo Kaneko
    • 1
  • Hiroshige Yamabe
    • 1
  • Tadashi Hoshiyama
    • 2
  • Hisanori Kanazawa
    • 1
  • Miwa Ito
    • 1
  • Yusuke Kanemaru
    • 1
  • Takuya Kiyama
    • 1
  • Kenichi Tsujita
    • 1
  1. 1.Department of Cardiovascular Medicine, Graduate School of Medical SciencesKumamoto UniversityKumamotoJapan
  2. 2.Division of CardiologyKumamoto Chuo HospitalKumamotoJapan

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