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Preventive effect on postoperative atrial fibrillation and stroke by ablation of the ligament of Marshall and amputation of the left atrial appendage

Research Project

Project/Area Number 19K17615
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53020:Cardiology-related
Research InstitutionJuntendo University

Principal Investigator

Endo Daisuke  順天堂大学, 医学部, 助教 (50815644)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords心房細動 / 左心耳 / Marshall靭帯 / 冠動脈バイパス術 / 透析 / 脳卒中 / 脳梗塞 / 末期腎不全 / 慢性腎臓病 / 開心術 / 心拍動下
Outline of Research at the Start

心房細動は開心術後に生じる最も頻度の高い合併症であり、脳梗塞の原因の20-25%を占める。心房細動における血栓は主に左心耳に生じるため、左心耳を閉鎖することで脳梗塞のリスク軽減が可能となる。一方で、左心耳の生理機能についての研究は少ない。また、術後心房細動の機序は解明されていないが、発症要因の一つとして自律神経活動があり、左上大静脈の痕跡であるマーシャル靭帯の関与が指摘されている。本研究の目的は、マーシャル靱帯切離の心房細動・脳梗塞抑制効果を検証すると共に、マウス及びヒト左心耳検体を用いた左心耳の生理機能を解析し、左心耳機能の温存と血栓形成抑制を両立可能な新規左心耳切除法の確立を目指す。

Outline of Final Research Achievements

This study investigated the effectiveness of Marshall ligament resection for postoperative atrial fibrillation (AF) in patients with preoperative sinus rhythm, as well as the efficacy of left atrial appendage (LAA) closure in dialysis patients. Among 323 patients who underwent coronary artery bypass grafting (CABG), the incidence of postoperative AF was compared between the Marshall ligament resection group (28 patients) and the non-resection group (295 patients), with no significant difference observed. Out of 2,783 patients who underwent CABG, 242 were dialysis patients with sinus rhythm. Clinical outcomes were compared based on the presence or absence of LAA closure. It was demonstrated that LAA closure reduced the risk of mortality and stroke in dialysis patients with sinus rhythm.

Academic Significance and Societal Importance of the Research Achievements

冠動脈バイパス術(CABG)後に生じる心房細動(AF)は最も頻度の高い合併症の一つである。AFは左心耳(LAA)に血栓を形成することで、脳梗塞の原因となりうる。特に、透析を受けている末期腎不全(ESRD-HD)患者は、AFに関連した脳卒中リスクが高い。塞栓症予防として抗凝固療法は標準治療であるが、ESRD-HD患者は出血リスクが高いことから抗凝固療法のベネフィットとリスクは議論が分かれる。本研究において、術前洞調律のESRD-HD患者において、CABGと同時LAA閉鎖が全死亡ならびに脳卒中リスク軽減効果があることを示したことは意義が高い。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2023 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 3 results) Book (1 results)

  • [Journal Article] Left Atrial Appendage Closure During Coronary Bypass Surgery in Patients on Hemodialysis2023

    • Author(s)
      Endo D, Kinoshita T, Lee J, Machida Y, Nishida K, Sato Y, Yamamoto T, Tabata M.
    • Journal Title

      Circulation Journal

      Volume: 87 Issue: 7 Pages: 982-989

    • DOI

      10.1253/circj.CJ-22-0573

    • ISSN
      1346-9843, 1347-4820
    • Year and Date
      2023-06-23
    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Neointima on the scar site after the left atrial appendage amputation2019

    • Author(s)
      Daisuke Endo MD, PhD | Taira Yamamoto MD, PhD | Kenji Kuwaki MD, PhD | Kan Kajimoto MD, PhD | Atsushi Amano MD, PhD
    • Journal Title

      Journal of cardiac surgery

      Volume: 34 Issue: 9 Pages: 855-855

    • DOI

      10.1111/jocs.14127

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] The preventive effect of left atrial appendage amputation on atrial fibrillation in patients with end-stage renal disease2021

    • Author(s)
      Daisuke Endo
    • Organizer
      EACTS2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Early postoperative atrial fibrillation after coronary artery bypass grafting aggravates late-onset atrial fibrillation?2020

    • Author(s)
      Daisuke Endo
    • Organizer
      34rd Annual Meeting European Association for Cardio-Thoracic Surgery
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] New postoperative atrial fibrillation after coronary artery bypass grafting increases the incidence of late onset atrial fibrillation2020

    • Author(s)
      Daisuke Endo
    • Organizer
      第73 回日本胸部外科学会定期学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] 心拍動下冠動脈バイパス術時の左心耳切除術併施は術後脳梗塞を予防するか?2020

    • Author(s)
      Daisuke Endo
    • Organizer
      第34回日本不整脈外科研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] 5-year outcomes of surgical left atrial appendage amputation on stroke prevention in patients undergoing offpump coronary artery bypass grafting2019

    • Author(s)
      Endo Daisuke
    • Organizer
      33rd Annual Meeting European Association for Cardio-Thoracic Surgery
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] ハートチームのための 心臓血管外科手術 周術期管理のすべて-改訂第2版2023

    • Author(s)
      遠藤大介、國原孝
    • Total Pages
      656
    • Publisher
      メジカルビュー社
    • ISBN
      9784758322065
    • Related Report
      2022 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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