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Novel classification system for assesing risk of progressive ascending aortic dialation associated with bicuspid aortic valve

Research Project

Project/Area Number 19K09277
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55030:Cardiovascular surgery-related
Research InstitutionTokyo Women's Medical University

Principal Investigator

Hattori Kaoru  東京女子医科大学, 医学部, 助教 (30724439)

Co-Investigator(Kenkyū-buntansha) 岩崎 清隆  早稲田大学, 理工学術院, 教授 (20339691)
新浪 博  東京女子医科大学, 医学部, 教授 (30241079)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords大動脈二尖弁 / 上行大動脈瘤 / 拍動循環システム / 4D-flow MRI / 上行大動脈血流 / 大動脈弁 / 上行動脈瘤
Outline of Research at the Start

大動脈二尖弁は上行大動脈瘤の合併が多く、大動脈弁置換術後も瘤径拡大が進行する。拡大速度は個人差が大きく、適切な治療法の選択には、瘤径拡大の危険度予測に対応した手術適応基準が必要である。瘤径拡大の主要危険予測因子として申請者らは弁の開放形態に着目し、その重要規定因子は①弁の開閉方向、②交連配置角の比であると推測する。本研究では①②をパラメーターとする大動脈二尖弁の新しい弁形態分類案を作成し、弁モデルと拍動循環シミュレーターを用いた医工学研究によって、急速な瘤径拡大の原因となり得る「ハイリスク型弁形態」を明らかにする。

Outline of Final Research Achievements

In this study, morphotype-specific valve-devising apparatuses was developed to create aortic valve models, and an MRI-compatible pulsatile flow circulation system was developed to quantify the aortic valvular outflow jet. This study elucidated that bicuspid symmetry and the position of smaller leaflet were determinant factors of the characteristics of aortic valvular outflow jet.

Academic Significance and Societal Importance of the Research Achievements

本研究結果は大動脈二尖弁の弁形態が上行大動脈瘤の瘤径拡大リスクを層別化するための指標として有用であることを示唆し、個々の瘤径拡大リスクに基づいた治療を提供するための新たな治療指針の作成に寄与し得るものと推察された。

Report

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

    (8 results)

All 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 4 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Bicuspid aortic valve morphology and aortic valvular outflow jets: An experimental analysis using an MRI-compatible pulsatile flow circulation system2021

    • Author(s)
      K. Hattori, N. Nakama, J. Takada, G. Nishimura, R. Moriwaki, E. Kawasaki, M. Nagao, Y. Goto, H. Niinami, K. Iwasaki
    • Journal Title

      Scientific Reports

      Volume: 11:2066 Issue: 1 Pages: 1-12

    • DOI

      10.1038/s41598-021-81845-w

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Experimental analysis of aortic valve hemodynamics: effect of mild aortic dilatation on systolic flow characteristics2021

    • Author(s)
      Kaoru Hattori, Natsuki Nakama, Jumpei Takada, Hiroshi Niinami, Kiyotaka Iwasaki
    • Organizer
      American Heart Association Scientific Session 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bicuspid aortic valve morphology and risk factors of abnormal hemodynamics: An experimental investigation of velocity, vorticity and eccentricity of systolic jet stream, using a magnetic resonance compatible pulsatile flow circulation system2020

    • Author(s)
      Kaoru Hattori, Natsuki Nakama, Jumpei Takada, Gohki Nishimura, Ryo Moriwaki, Eita Kawasaki, Michinobu Nagao, Yasuhiro Goto, Hiroshi Niinami, Kiyotaka Iwasaki
    • Organizer
      AHA scientific session
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Relationships between bicuspid aortic valve morphology and henodynamics: An experimental investigation of flow, leakage, and supra-valvular jet using a pulsatile circulation system and magnetic flow imaging2019

    • Author(s)
      服部 薫
    • Organizer
      AHA Scientific Sessions 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大動脈二尖弁の弁癒合形態が上行大動脈の血流形態に及ぼす影響2019

    • Author(s)
      服部 薫
    • Organizer
      第57回人工臓器学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Four-dimensional flow MRI assessment of valvular flow characteristics: Systokic flow patterns, direction and velocity of supra-valvular jet in experimental bicuspid aortic valve models2019

    • Author(s)
      服部 薫
    • Organizer
      The 17th International Conference on Biomedical Engineering
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大動脈弁モデルと拍動循環シミュレータを用いた大動脈二尖弁の弁機能評価2019

    • Author(s)
      服部 薫
    • Organizer
      第72回日本胸部外科学会定期学術集会
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] j人工弁尖用器具、並ぶに、人工弁尖及び弁付き人工血管の製造方法2019

    • Inventor(s)
      岩﨑清隆
    • Industrial Property Rights Holder
      岩﨑清隆
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Research-status Report

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

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