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Analysis and imaging of arrhythmia electrophysiological phenomena in the heart by modeling and experimental investigation of them

Research Project

Project/Area Number 12308046
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Biomedical engineering/Biological material science
Research InstitutionThe University of Tokyo

Principal Investigator

INADA Hiroshi  Graduate School of Engineering, Professor, 大学院・工学系研究科, 教授 (20028393)

Co-Investigator(Kenkyū-buntansha) NAKAZAWA Kazuo  National Cardiovascular Center, Research Institute, Manager(Researcher), 研究所, 室長(研究職) (50198058)
KODAMA Itso  Nagoya University, Research Institute of Environmental Medicine, Professor, 環境医学研究所, 教授 (30124720)
SAKUMA Ichiro  Graduate School of Frontier Sciences, Professor, 大学院・新領域創成科学研究科, 教授 (50178597)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥33,160,000 (Direct Cost: ¥28,300,000、Indirect Cost: ¥4,860,000)
Fiscal Year 2002: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Fiscal Year 2001: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2000: ¥12,100,000 (Direct Cost: ¥12,100,000)
KeywordsArrhythmia / Computer simulation / Spiral reentry / LR model / Optical mapping system of myocardial action potential / Response of whole heart to electrical stimuli / Two dimensional specimen of the parfused rabbit / Dynamics of spiral reentry / Siral Reentry / LR2次元バイドメイン仮想心室筋モデル / 心室細動電気的除細動メカニズム / Siral Reentr のダイナミクス / M細胞 / 広領域心臓活動電位計測 / 機能的ブロックライン / 心筋細胞膜活動電位光学マッピングシステム / シミュレーション / LRモデル / スーパーコンピュータ / 心臓の興奮伝播の可視化 / 高速DVCR / 抗不整脈薬
Research Abstract

In the present study we applied techniques of computer simulation to analyzing propagation of cardiac excitation wave at the occurrence of arrhythmia and its related phenomena and developed a system for measuring action potential of myocardial cell membrane. Then, the following investigations were conducted in order to compare observation results of spiral reentry generated by experiments with results of the simulation. (1) Simulation by using a model of myocardial action potential and visualization of propagation of cardiac excitation : In this study, one myocardial unit was expressed by the differential equation by using LR(Luo-Rudy) model and the simulation of arrhythmias was performed with a supercomputer. Secondly, we reproduced the propagation of cardiac excitation based on the theory of spiral wave and succeeded in visualization of the propagation.c Development of a optical mapping system of myocardial action potential and investigation of responses of a whole heart to electric … More stimuli by analyzes of optical signals : We developed a high-resolution optical mapping system with two high-speed video digital cameras to observe widely membrane action potential of a heart of a Japanese white rabbit which was dyed using the voltage sensitive dye di-4-ANEPPS. The responses of the whole heart to the electric stimuh can be investigated in detail by the analyzes of optical signals with the system. (3) Analysis of the relationship between dynamics of spiral reentry and the action potential using the perfused rabbit heart as materials and investigation of function of anti-arrhythmic drugs : By using the optical mapping system, the spiral reentry of two-dimensional specimen of the perfused rabbit heart is investigated from the viewpoint of dynamics of excitation rotation and changes in the wave shape of action potential and the function of anti-arrhythmic drugs. As the results, it was revealed that the dynamics of the spiral reentry was associated with interaction of the wave fronts and the tails of excitation, anisotropy of myocardial structure and so on. Less

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (38 results)

All Other

All Publications (38 results)

  • [Publications] Ichiro Sakuma, Hiroshi Inada, Itsuo Kodama, et al.: "Computer Simulations of Elecrical Propagation in Cardiac Tissue"Medical Physics. 27・6. (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Itsuo Kodama, Ichiro Sakuma, et al.: "Regional differences in arrhytmogenic after effects of high intensity DC stimulation in the ventricle"Pacing and Clinical Electrophysiology. 23. 807-817 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Itsuo Kodama, et al.: "Analysis of epicardial activation patterns during DC-shock induced ventricular tachycardia"Environmental Medicine. 44. 32-34 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Hiroshi Inada, Itsuo Kodama, et al.: "A high-resolution optical mapping and analysis system of action potentials during ventricular arrhythmias"Proceeding of the 3rd China-Japan-Korea Joint Symposium on Medical Informatics. 53-55 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Hiroshi Inada, Itsuo Kodama, et al.: "Computer simulation of reentrant spiral excitation propagation in cardiac tissue"Proceeding of the 3rd China-Japan-Korea Joint Symposium on Medical Informatics. 56-58 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Itsuo Kodama, et al.: "Sustained monomorphic ventricular tachycardia in the two-dimensional left ventricular epicardial sheets of rabbit hearts perfused in-vitro"Environmental Medicine. 45. 92-94 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kazuo Nakazawa, et al.: "Role of structural complexities of septum tissue in maintaining ventricular fibrillation in isolated, perfused canine ventricle"Journal of Cardiovascular Electrophysiology. 12(1). 66-75 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kazuo Nakazawa, et al.: "Breakthrough waves during ventricular fibrillation depend on the degree of rotational anisotropy and the boundary conditions"Journal of Cardiovascular Electrophysiology. 12(3). 312-322 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Hiroshi Inada, Kodama I, et al.: "Na+ channel blockade causes a prolongation of electrical diastole during spiral-type reentry in the ventricle"Environmental Medicine. 46. 103-105 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nakazawa K, et al.: "Afterdepolarizations Promote the Transition From Ventricular Tachycardia to Fibrillation in a Three Dimensional Model of Cardiac Tissue"Circulation Journal. 66(5). 505-510 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Hiroshi Inada, Itsuo Kodama, et.al: "Computer Simulations of Electrical Propagation in Cardiac Tissue"Medical Physics. 27-6. (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Itsuo Kodama, Ichiro Sakuma, et.al: "Regional differences in arrhytmogenic after effects of high intensity DC stimulation in the ventricle"Pacing and Chinical Electrophysiology. 23. 807-817 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Itsuo Kodama, et.al: "Analysis of epicardial activation patterns during DC-shock induced ventricular tachycardia"Environmental Medicine. 44. 32-34 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Hiroshi Inada, Itsuo Kodama, et.al: "A high-resolution optical mapping and analysis system of action potentials during ventricular arrhythmias"Proceeding of the 8rd China-Japan-Korea Joint Symposium on Medical Informatics. 53-55 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Hiroshi Inada, Itsuo Kodama, et.al: "Computer simulation of reentrant spiral excitation propagation in cardiac tissue"Proceeding of the 3rd China-Japan-Korea Joint Symposium on Medical Informatics. 56-58 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Itsuo Kodama, et.al: "Sustained monomorphic ventricular tachycardia in the two-dimensional left ventricular epicardial sheets of rabbit hearts perfused in-vitro"Environmental Medicine. 45. 92-94 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kazuo Nakazawa, et.al: "Role of structural complexities of septum tissue in maintaining ventricular fibrillation in isolated, perfused canine ventricle"Journal of Cardiovascular Electrophysiology. 12(1). 66-75 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kazuo Nakazawa, et.al: "Breakthrough waves during ventricular fibrillation depend on the degree of rotational anisotropy and the boundary conditions"Journal of Cardiovascular Electrophysiology. 12(3). 312-322 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichiro Sakuma, Hiroshi Inada, Kodama, I., et.al: "Na+ channel blockade causes a prolongation of electrical diastole during spiral-type reentry in the ventricle"Environmental Medicine. 46. 103-105 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nakazawa K., et.al: "Afterdepolarizations Promote the Transition From Ventricular Tachycardia to Fibrillation in a Three Dimensional Model of Cardiac Tissue"Circulation Journal. 66(5). 505-510 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 稲田 紘, 佐久間一郎, 児玉逸雄, 他: "心室スパイラル・リエントリーのダイナミクスと薬物作用-ウサギ二次元灌流心の膜電位光学マッピングによる解析-"日本エム・イー学会雑誌論文号 生体医工学. 40(Suppl,2). 175-176 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sakuma I, Inada H, Kodama I, et al.: "Na+ channel blockade causes a prolongation of electrical diastole during spiral-type reentry in the ventricle"Environmental Medicine. 46. 103-105 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 児玉逸雄, 他: "心室のスパイラル・リエントリー"心臓. 34. 918-925 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 児玉逸雄, 佐久間一郎, 他: "心室細動と除細動のメカニズム"ICUとCCU. 26. 661-665 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nakazawa K, et al.: "Afterdepolarizations Promote the Transition From Ventricular Tachycardia to Fibrillation in a Three Dimensional Model of Cardiac Tissue"Circulation Journal. 66(5). 505-510 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 中沢一雄, 他: "R-on-TとPacing-on-Tでは心室受攻期が異なる:コンピュータシミュレーションによる研究"不整脈. 18(4). 496-503 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sakuma I, Inada H, Kodama I, et al.: "A high-resolution optical mapping and analysis system of action potentials during ventricular arrhythmias"Proceeding of the 3rd China-Japan-Korea Joint Symposium on Medical Informatics. 53-55 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Sakuma I, Inada H, Kodama I, et al.: "Computer simulation of reentrant spiral excitation propaggation in cardiac tissue"Proceeding of the 3rd China-Japan-Korea Joint Symposium on Medical Informatics. 56-58 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 佐久間一郎, 稲田絋, 児玉逸雄, 他: "心室スパイラルエントリーの成立機構と薬物作用-活動電位光学マッピングによる解析"心臓. 33. 449-455 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Sakuma I, Kodama I, et al.: "Sustained monomorphic ventricular tachycardia in the two-dimensional left ventricular epicardial sheets of rabbit hearts perfused in-vitro"Environmental Medicine. 45. 92-94 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nakazawa K, et al.: "Role of structural complexities of septum tissue in maintaining ventricular fibrillation in isolated, perfused canine ventricle"Journal of Cardiovascular Electrophysiology. 12(1). 66-75 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nakazawa K, et al.: "Breakthrough waves during ventricular fibrillation depend on the degree of rotational anisotropy and the boundary conditions"Journal of Cardiovascular Electrophysiology. 12(3). 312-322 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Ichiro Sakuma,Hiroshi Inada,Itsuo Kodama, et al: "Computer Simulations of Elecrical Propagation in Cardiac Tissue"Medical Physics. 27・6. (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 中沢一雄,稲田紘 他: "スーパーコンピュータを利用した頻脈的不整脈の興奮波ダイナミクスの3次元動画表現"医療情報学. 20・Suppl・2. 604-605 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kazuo Nakazawa, et al.: "Rotational Anisotropy Promotrs Breakthrough-Wave in Left Ventricle during Fibrillation : A Simulation Study"Journal of Cardicvascular Electrophysiology. 12・3(in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 中沢一雄 他: "LR心室形状モデルにおける心電図再構成の試み"電子情報通信学会技術研究報告. 100・350. 9-16 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Itsuo Kodama,Ichiro Sakuma, et al.: "Regional differences in arrhytmogenic aftereffects of high intensity DC stimulation in the ventricle"Pacing and Clinical Electrophysiology. 23. 807-817 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ichiro Sakuma,Itsuo Kodama, et al.: "Analysis of epicardial activation patterns during DC-shock induced ventricular tachycardia"Environmental Medicine. 44. 32-34 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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