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Development of new targeted substrate for ablation based on dominant frequency and rotor analysis in persistent atrial fibrillation

Research Project

Project/Area Number 20K08495
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53020:Cardiology-related
Research InstitutionTohoku Medical and Pharmaceutical University

Principal Investigator

KUMAGAI Koji  東北医科薬科大学, 医学部, 教授 (30400328)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords持続性心房細動 / 心房内低電位領域 / 高周波数部位 / 渦巻き型旋回興奮波 / 肺静脈隔離 / 心房細動 / アブレーション
Outline of Research at the Start

心房細動の駆動源である渦巻き型旋回興奮波(ローター)が注目されており、心房内でのローターの動きの可視化が最近報告された。私たちは周波数解析により、心房細動の駆動源と考えられる高周波数部位を同定し焼灼する心筋焼灼術を開発した。次いで、同部位が、心房内低電位領域に分布することも見出した。本研究では、これらの成果を発展させ、最近使用可能となったローターのオンライン・リアルタイム不整脈映像化システムに着目し、高周波数部位でのローターの機序を解明する。さらに、心房内低電位領域における傷害心筋・繊維化とローターの停留機序を解明し、持続性心房細動の新たな標的の開発へ臨床的応用を目指す。

Outline of Final Research Achievements

The proportion of low voltage areas (LVAs) in the left atrium (LA) after pulmonary vein isolation (PVI) in persistent atrial fibrillation (AF) was actually mild despite LA enlargement. There were no significant differences in maximum high dominant frequency values between the recurrent and non-recurrent groups. LVAs were mostly found in the septum, anterior and inferior wall in LA. The frequency of rotors, which were the driving force of AF, was still high even after PVI in persistent AF, but there was no significant difference between the recurrent and non-recurrent groups. Finally, there was a significant difference between both groups in the LVAs and the overlap area between LVAs and high dominant frequency. The high dominant frequency sites in the injured myocardium and fibrosis of the LA may reflect the potential drivers of AF.

Academic Significance and Societal Importance of the Research Achievements

発作性心房細動に対するカテーテルアブレーションの有効性は、すでに確立されているが、持続性心房細動に対しては未だ確立していない。肺静脈隔離後、心房細動基質に対する有効な追加すべき修飾法が明らかでないからである。本研究にて、肺静脈隔離後の低電位領域の割合は軽度であるが、低電位領域と、その高周波数部位とのoverlap部位が至適焼灼部位の候補であった。心房の傷害心筋・繊維化における高周波数部位が心房細動の駆動源を表すと考えられ、アブレーションの新しい標的となるかもしれない。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (15 results)

All 2023 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (13 results) (of which Invited: 2 results)

  • [Journal Article] The electrophysiological characteristics of the initiation of atrial fibrillation from the pulmonary veins2022

    • Author(s)
      Kumagai Koji
    • Journal Title

      Journal of Cardiovascular Electrophysiology

      Volume: 33 Issue: 4 Pages: 638-640

    • DOI

      10.1111/jce.15376

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Predictors of recurrence of atrial tachyarrhythmias after pulmonary vein isolation by functional and structural mapping of nonparoxysmal atrial fibrillation2021

    • Author(s)
      Kumagai Koji、Sato Tsukasa、Kurose Yuki、Sumiyoshi Takenori、Hasegawa Kaoru、Sekiguchi Yuko、Yambe Minoru、Komaru Tatsuya
    • Journal Title

      Journal of Arrhythmia

      Volume: 38 Issue: 1 Pages: 86-96

    • DOI

      10.1002/joa3.12670

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] A possible bailout strategy for immediate recurring atrial fibrillation (IRAF) after pulmonary vein isolation2023

    • Author(s)
      佐藤司、熊谷浩司
    • Organizer
      第69回日本不整脈心電学会学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Prospective trial of Radiofrequency Catheter Ablation of High Dominant Frequencies after Pulmonary Vein Isolation in Non-paroxysmal Atrial Fibrillation (PAD-AF Trial): interim analysis of a multicenter trial2023

    • Author(s)
      熊谷浩司
    • Organizer
      第69回日本不整脈心電学会学術大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 肺静脈隔離術後の即時再発性心房細動(IRAF)に対する治療戦略2023

    • Author(s)
      佐藤司、熊谷浩司
    • Organizer
      第3回日本不整脈心電学会東北支部地方会
    • Related Report
      2023 Annual Research Report
  • [Presentation] BOX隔離後も誘発しうる再発性心房細動に対してCARTO FinderとDF mappingに基づく追加焼灼が有効であった1例2023

    • Author(s)
      住吉剛忠、熊谷浩司
    • Organizer
      第176回日本循環器学会東北地方会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 基質的心疾患を認めない心室頻拍に対して心外膜アプローチによる高周波アブレーションが奏功した1例2022

    • Author(s)
      佐藤 司、熊谷浩司
    • Organizer
      カテーテルアブレーション関連秋季大会2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 伝導回路の一部が心筋層内に推定され、入力部位に対してクライオアブレーションの線状焼灼が奏功した進行性不整脈源性右室心筋症心室頻拍の1例2022

    • Author(s)
      野田一樹、熊谷浩司
    • Organizer
      カテーテルアブレーション関連秋季大会2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 軽度低電位領域部位にExTRa Mappingで認めた前壁のrotor高頻度部位がリモデリングの初期を反映し、1年後に心房頻拍として認めた1例2022

    • Author(s)
      黒瀬裕樹、熊谷浩司
    • Organizer
      カテーテルアブレーション関連秋季大会2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 持続性心房細動に対する肺静脈隔離後に左房前壁を旋回する心房頻拍が誘発され、緩徐伝導路を含む前壁ラインの焼灼が奏功した1例2022

    • Author(s)
      野田一樹、熊谷浩司
    • Organizer
      カテーテルアブレーション関連秋季大会2022
    • Related Report
      2022 Research-status Report
  • [Presentation] Relationship between rotors/dominant frequencies and low-voltage areas after pulmonary vein isolation in non-paroxysmal atrial fibrillation using a bi-directional high-density mapping catheter2022

    • Author(s)
      熊谷浩司
    • Organizer
      第67回日本不整脈心電学会学術大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Predictors of Recurrence of Atrial Tachyarrhythmias after Pulmonary Vein Isolation by Functional and Structural Mapping of Non-paroxysmal Atrial Fibrillation2021

    • Author(s)
      熊谷浩司
    • Organizer
      第86回日本循環器学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Relationship Between Rotors/dominant-frequencies and Low-voltage Areas Using a Bi-directional High-density Mapping Catheter after Pulmonary Vein Isolation in Non-paroxysmal Atrial Fibrillation2021

    • Author(s)
      熊谷浩司
    • Organizer
      第85回日本循環器学会学術集
    • Related Report
      2021 Research-status Report
  • [Presentation] Relationship Between Rotors/dominant-frequencies and Low-voltage Areas Using a Bi-directional High-density Mapping Catheter after Pulmonary Vein Isolation in Non-paroxysmal Atrial Fibrillation2021

    • Author(s)
      熊谷浩司
    • Organizer
      第85回日本循環器学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Impact of a bi-directional high-density mapping catheter on low-voltage area based ablation after pulmonary vein isolation in non-paroxysmal atrial fibrillation2020

    • Author(s)
      熊谷浩司
    • Organizer
      第84回日本循環器学会学術集会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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