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Interventricular dyssynchrony during continuous-flow left ventricular assist device support

Research Project

Project/Area Number 19K18201
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55030:Cardiovascular surgery-related
Research InstitutionNational Cardiovascular Center Research Institute

Principal Investigator

Shimamura Junichi  国立研究開発法人国立循環器病研究センター, 研究所, 客員研究員 (20827696)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords左室補助人工心臓 / 重症心不全 / 同期不全 / 右心不全 / 末梢循環 / 心室間同期不全
Outline of Research at the Start

左室補助人工心臓装着中に特徴的に生じると考えられるinterventricular dyssynchronyの病態解明と、同現象が右室機能及び心室中隔運動にもたらす影響の評価を行う。さらに、自己心拍に同期したLVAD補助によりinterventricular dyssynchronyを制御することにより中隔偏位や右室機能低下を予防し得るLVAD駆動モードの開発を目指す。

Outline of Final Research Achievements

Under continuous-flow left ventricular assist device (CF-LVAD) support, the ventricular volume change and cardiac cycle between the left ventricle (LV) and right ventricle (RV) become dyssynchronous due to the shortening of the LV systole.The purpose of this study was to quantify interventricular dyssynchrony based on different CF-LVAD support conditions and assess its relationship with LV unloading. We implanted a centrifugal LVAD under general anesthesia to goats with normal hearts. We inserted the conductance catheters into LV and RV to assess the volume signal simultaneously. We defined the dyssynchronous (DYS)status as the sign of the LV volume-change opposite to that of RV volume-change. DYS was quantified and also found to be associated with the degree of LV unloading. These findings may be useful for understanding interventricular interactions and physiology during CF-LVAD support. Influences on the right ventricular function and heart failure models warrant further study.

Academic Significance and Societal Importance of the Research Achievements

本研究は左室補助人工心臓駆動時の機械的心室間同期不全の機序および心室間相互作用に及ぼす影響に関して検討したものである。左室補助人工心臓装着後の主要合併症である右心不全の詳細な機序は依然解明されていないが、本現象は重症心不全患者に合併する同期不全の増悪や、心室中隔運動への影響を介して右心機能への影響をもたらす重要な一因と考えられる。適切な左室補助人工心臓駆動により同現象を制御することは、右室機能不全改善に有用であることが示唆される。以上より、本研究で得られる知見は左室補助人工心臓駆動に伴う心室間相互作用の理解に役立ち、安全でより生理的な左室補助人工心臓駆動方法の開発に寄与するものである。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (17 results)

All 2021 2020 2019

All Journal Article (9 results) (of which Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Assessment of ocular blood flow in continuous-flow ventricular assist device by laser speckle flowgraphy2021

    • Author(s)
      Shimamura Junichi、Nishinaka Tomohiro、Mizuno Toshihide、Tsukiya Tomonori、Inatomi Ayako、Kobayashi Futoshi、Katagiri Nobumasa、Takewa Yoshiaki、Nishimura Takashi、Ono Minoru、Tatsumi Eisuke
    • Journal Title

      Journal of Artificial Organs

      Volume: 24 Issue: 4 Pages: 419-424

    • DOI

      10.1007/s10047-021-01265-5

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 第58回日本人工臓器学会大会 論文賞(循環)受賞レポート Quantification of interventricular dyssynchrony during continuous-flow left ventricular assist device support2021

    • Author(s)
      島村淳一
    • Journal Title

      人工臓器

      Volume: 50 Pages: 32-33

    • Related Report
      2021 Annual Research Report
  • [Journal Article] 第58回日本人工臓器学会大会 論文賞(循環)受賞レポート Mathematical evaluation of cardiac beat synchronization control used for a rotary blood pump2021

    • Author(s)
      小川大祐、小林信治、山﨑健二、本村禎、西村隆、島村淳一、築谷朋典、水野敏秀、武輪能明、巽英介
    • Journal Title

      人工臓器

      Volume: 50 Pages: 34-36

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Evaluation of cardiac beat synchronization control for a rotary blood pump on valvular regurgitation with a mathematical model.2021

    • Author(s)
      Ogawa D, Kobayashi S, Yamazaki K, Motomura T, Nishimura T, Shimamura J, Tsukiya T, Mizuno T, Takewa Y, Tatsumi E, Nishinaka T.
    • Journal Title

      Artif Organs.

      Volume: 45 Issue: 2 Pages: 124-134

    • DOI

      10.1111/aor.13795

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 第58回日本人工臓器学会 論文賞(循環)受賞レポート(発表確定)2021

    • Author(s)
      島村淳一
    • Journal Title

      人工臓器

      Volume: 1 Pages: 1-1

    • Related Report
      2020 Research-status Report
  • [Journal Article] Quantification of interventricular dyssynchrony during continuous-flow left ventricular assist device support.2019

    • Author(s)
      Shimamura J, Nishimura T, Mizuno T, Takewa Y, Tsukiya T, Inatomi A, Ando M, Umeki A, Naito N, Ono M, Tatsumi E
    • Journal Title

      J Artif Organs.

      Volume: 22 Issue: 4 Pages: 269-275

    • DOI

      10.1007/s10047-019-01109-3

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Interventricular dyssynchrony during continuous-flow left ventricular assist device support: observation using the conductance method.2019

    • Author(s)
      Shimamura J, Nishimura T, Mizuno T, Takewa Y, Tsukiya T, Inatomi A, Katagiri N, Ando M, Umeki A, Akiyama D, Arakawa M, Ono M, Tatsumi E.
    • Journal Title

      J Artif Organs.

      Volume: 22 Issue: 4 Pages: 348-352

    • DOI

      10.1007/s10047-019-01115-5

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Miniaturized centrifugal ventricular assist device for bridge to decision: preclinical chronic study in a bovine model.2019

    • Author(s)
      Shimamura J, Mizuno T, Takewa Y, Tsukiya T, Naito N, Akiyama D, Iiduka K, Katagiri N, Nishimura T, Ono M, Tatsumi E.
    • Journal Title

      Artif Organs.

      Volume: 印刷中 Issue: 9 Pages: 821-827

    • DOI

      10.1111/aor.13459

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mathematical evaluation of cardiac beat synchronization control used for a rotary blood pump.2019

    • Author(s)
      Ogawa D, Kobayashi S, Yamazaki K, Motomura T, Nishimura T, Shimamura J, Tsukiya T, Mizuno T, Takewa Y, Tatsumi E.
    • Journal Title

      J Artif Organs.

      Volume: 43 Issue: 4 Pages: 276-285

    • DOI

      10.1007/s10047-019-01117-3

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] JATS Research Project Award 受賞講演2021

    • Author(s)
      島村淳一
    • Organizer
      第74回日本胸部外科学会定期学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] JSAO Grant技術賞論文賞講演2021

    • Author(s)
      島村淳一
    • Organizer
      第59回日本人工臓器学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 「Quantification of interventricular dyssynchrony during continuous-flow left ventricular assist device support」 〔2020年度論文賞【循環領域】〕2020

    • Author(s)
      Shimamura J, Nishimura T, Mizuno T, Takewa Y, Tsukiya T, Inatomi A, Ando M, Umeki A, Naito N, Ono M, Tatsumi E.
    • Organizer
      第58回日本人工臓器学会大会 JSAO Grant 技術賞 論文賞 受賞者講演
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 「Mathematical evaluation of cardiac beat synchronization  control used for a rotary blood pump」 〔2020年度論文賞【代謝領域】〕2020

    • Author(s)
      Ogawa D, Kobayashi S, Yamazaki K, Motomura T, Nishimura T, Shimamura J, Tsukiya T, Mizuno T, Takewa Y, Tatsumi E, Nishinaka T.
    • Organizer
      第58回日本人工臓器学会大会 JSAO Grant 技術賞 論文賞 受賞者講演
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 定常流LVAD治療における心室間同期不全の提唱および定量化に関する検討2019

    • Author(s)
      島村淳一、水野敏秀、武輪能明、築谷朋典、片桐伸将、西村 隆、小野 稔、巽 英介
    • Organizer
      人工心臓と補助循環懇話会学術集会 (47)
    • Related Report
      2019 Research-status Report
  • [Presentation] 定常流型LVAD駆動に伴う両心室容積変化に関する基礎的検討2019

    • Author(s)
      島村淳一、水野敏秀、武輪能明、築谷朋典、片桐伸将、西村 隆、小野 稔、巽 英介
    • Organizer
      定常流ポンプ研究会学術集会2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Interventricular dyssynchrony during continuous-flow left ventricular assist device support2019

    • Author(s)
      Shimamura J, Mizuno T, Tsukiya T, Takewa Y, Inatomi A, Nishimura T, Ono M, Tatsumi E
    • Organizer
      Annual European Society for Artificial Organs Congress (46)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Asynchronous ventricular volume change during coutinuous-flow left ventricularassist device support2019

    • Author(s)
      Shimamura J, Mizuno T, Tsukiya T, Takewa Y, Inatomi A, Nishimura T, Ono M, Tatsumi E
    • Organizer
      Annual Meeting of the International Society for Mechanical Circulatory Support (27)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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