Cardiac energetics calculated by a circulation model combined with a comprehensive cardiac myocyte model, Kyoto Model.
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- Takahata Takayuki
- Cell/Biodynamics Simulation Project, Kyoto University, Kyoto, Japan Central Research Laboratories, Sysmex Corporation, Kobe, Japan
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- Asakura Keiichi
- Cell/Biodynamics Simulation Project, Kyoto University, Kyoto, Japan Research Laboratories, Nippon Shinyaku Co., Ltd., Kyoto, Japan
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- Sarai Nobuaki
- Cell/Biodynamics Simulation Project, Kyoto University, Kyoto, Japan Department of Nano-Medicine Merger Education Unit, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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- Matsuoka Satoshi
- Cell/Biodynamics Simulation Project, Kyoto University, Kyoto, Japan Department of Physiology and Biophysics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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- Noma Akinori
- Cell/Biodynamics Simulation Project, Kyoto University, Kyoto, Japan Department of Physiology and Biophysics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
Bibliographic Information
- Other Title
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- 心筋細胞モデルと循環モデルによる心臓力学・エネルギー解析
Abstract
In physiological experiments and clinical practices, the Pressure-Volume (PV) loop of left ventricle is important to evaluate the cardiac contractility and energetics. The end-systolic PV relation (ESPVR) is almost linear and its slope is well known as representing the maximum elastance (Emax) to evaluate the cardiac contractility. Furthermore, the pressure volume area (PVA) represents the total mechanical energy per beat and correlates with myocardial oxygen consumption. In order to study mechanical energetics in human cardiac myocyte, we developed a human circulation model which consisted of a preload, an afterload and a sphere heart. The pressure of the heart was converted from the tension of human ventricular myocyte model based on Kyoto Model according to Laplace's law. Our circulation model produced the PV loops with each afterload and showed a linear ESPVR. PVA was proportional to oxygen consumption like many experimental results. We calculated ATP consumptions per beat by the Na-K pump, SERCA and the cross-bridge. ATP consumptions by Na-K pump and SERCA was almost independent from PVA, while the ATP consumption by the cross-bridge was proportional to PVA. [J Physiol Sci. 2007;57 Suppl:S198]
Journal
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- Proceedings of Annual Meeting of the Physiological Society of Japan
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Proceedings of Annual Meeting of the Physiological Society of Japan 2007 (0), 198-198, 2007
PHYSIOLOGICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001205727243008
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- NII Article ID
- 130007038550
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed