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The change of myocardial blood flow after transcatheter aortic valve implantation

Research Project

Project/Area Number 19K17573
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Kiko Takatoyo  福島県立医科大学, 医学部, 助手 (50814480)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
KeywordsPET / MRI / Ammonia / 心筋血流 / ammonia / FDG / NaF
Outline of Research at the Start

重症大動脈弁狭窄症(severe AS)に対する経カテーテル大動脈弁植込術(TAVI)の成績は大動脈弁置換術に対して非劣勢であることが示されてきており、一般化されてきている。Severe ASの患者は低心拍出により、圧格差が過小評価されていることが多く、治療適応の患者が見落とされていることが多い。PET/MRI複合機は様々なPETトレーサーによる機能的評価と、MRIによる解剖学的評価を同時に可能である。本研究の目的は、PET/MRI複合機により13N-ammonia を用いて、severe ASに対するTAVI前後の血行動態および重症度の評価をより正確に行うことである。

Outline of Final Research Achievements

We revealed the hybrid PET / MRI procedures using various PET tracers for aortic valve stenosis. In particular, the safety method of ammonia PET / MRI under vasodilator stress was established, and it has been possible to evaluate myocardial blood flow before transcatheter aortic valve implantation. If we have more cases, we could evaluate the improvement of myocardial blood flow after transcatheter aortic valve implantation. In addition, there were cases in which FDG PET and NaF PET accumulated in the aortic valve, suggesting the possibility of evaluation for vulnerable plaques in the aortic valve.

Academic Significance and Societal Importance of the Research Achievements

大動脈弁狭窄症に対する経カテーテル的大動脈弁植え込み術は、外科的手術と比較して低侵襲であるため、今後はより適応が広くなる可能性が高い。PET/MRI複合機を用いて心筋血流や解剖学的評価を同時に行うことによって、重症度の評価のみならず、治療効果判定を行うこともできる。また、遠隔期の心血管イベント発生の関連を検討し、大動脈弁狭窄症のどのような病態が予後不良か、病態に合わせた最適治療法など、リスクの層別化を詳細に行い治療方針の決定について有用となる可能性がある。

Report

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

    (14 results)

All 2021 2020 2019

All Journal Article (7 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 7 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results)

  • [Journal Article] Simultaneous assessment of coronary flow reserve and left ventricular function during vasodilator stress evaluated by 13 N-ammonia hybrid PET/MRI2021

    • Author(s)
      Takatoyo Kiko
    • Journal Title

      Clinical Radiology

      Volume: 76 Pages: 472-472

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direct comparisons of left ventricular volume and function by simultaneous cardiac magnetic resonance imaging and gated 13N-ammonia positron emission tomography2020

    • Author(s)
      Takatoyo Kiko
    • Journal Title

      Nuclear Medicine Communications

      Volume: 41 Pages: 383-388

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Myocardial viability with chronic total occlusion assessed by hybrid positron emission tomography/magnetic resonance imaging2020

    • Author(s)
      Takatoyo Kiko
    • Journal Title

      Journal of Nuclear Cardiology

      Volume: Online ahead of print

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Takayasu arteritis detected by PET/MRI with 18 F-fluorodeoxyglucose2020

    • Author(s)
      Yasuchika Takeishi, Takatoyo Kiko
    • Journal Title

      Journal of Nuclear Cardiology

      Volume: 27 Pages: 333-335

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direct Comparisons of Left Ventricular Volume and Function by Simultaneous Cardiac Magnetic Resonance Imaging and Gated 13N-ammonia Positron Emission Tomography2020

    • Author(s)
      Takatoyo Kiko
    • Journal Title

      Nuclear Medicine Communications

      Volume: 41 Issue: 4 Pages: 383-388

    • DOI

      10.1097/mnm.0000000000001149

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Myocardial Viability With Chronic Total Occlusion Assessed by Hybrid Positron Emission Tomography/Magnetic Resonance Imaging2020

    • Author(s)
      Takatoyo Kiko
    • Journal Title

      Journal of Nuclear Cardiology

      Volume: online Issue: 5 Pages: 2335-2342

    • DOI

      10.1007/s12350-020-02041-3

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Subacute Constrictive Pericarditis Postcardiac Surgery Evaluated by 18 F-Fluorodeoxyglucose Positron Emission Tomography/Magnetic Resonance Imaging2019

    • Author(s)
      Takatoyo Kiko
    • Journal Title

      Circulation cardiovascular imaging

      Volume: 12 Issue: 11 Pages: 11-11

    • DOI

      10.1161/circimaging.119.009764

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] PET/MRI装置を用いた心臓イメージングの最前線2021

    • Author(s)
      Takatoyo Kiko
    • Organizer
      第31回 日本心血管画像動態学会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] FDG PET/MRIを用いた心サルコイドーシスの予後評価について2021

    • Author(s)
      Takatoyo Kiko
    • Organizer
      第7回 日本心筋症研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Prognostic Value Of Simultaneous Hybrid 18F-fluorodeoxyglucose Positron Emission Tomography/magnetic Resonance Imaging In Cardiac Sarcoidosis2020

    • Author(s)
      Takatoyo Kiko
    • Organizer
      American Heart Association
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Hybrid 18F-FDG PET/MRIを用いた慢性完全閉塞病変に対する心筋viability評価2020

    • Author(s)
      Takatoyo Kiko
    • Organizer
      第30回 日本心臓核医学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Direct Comparisons of Left Ventricular Volume and Function by Simultaneous Cardiac MRI and Gated 13N-ammonia PET2019

    • Author(s)
      Takatoyo Kiko
    • Organizer
      American Heart Association Scientific Session 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Simultaneous Evaluation of Myocardial Viability Between Late Gadolinium Enhancement Transmurality and 18F-fluorodeoxyglucose Uptake in Patients with Chronic Total Occlusion Using by Hybrid Positron Emission Tomography/Magnetic Resonance Imaging2019

    • Author(s)
      Takatoyo Kiko
    • Organizer
      American Heart Association Scientific Session 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Comparison of Diagnostic Performance of Relative Flow Reserve with Coronary Flow Reserve by 13N-ammonia PET to Detect Coronary Artery Disease2019

    • Author(s)
      Takatoyo Kiko
    • Organizer
      American Heart Association Scientific Session 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2022-01-27  

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