The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Um modelo eletrônico do vaso coronário composto por resistor, capacitor e transistor de efeito de campo (FET) é proposto para realizar uma simulação dinâmica da circulação coronária esquerda e esclarecer seus mecanismos. Com base nesse modelo, constrói-se um circuito equivalente da circulação coronária que é dividido em camadas subepicárdica e subendocárdica e consiste em segmentos de artéria, arteríola, capilar, vênula e veia para ambas as camadas. Nesta simulação, a forma de onda de fluxo observada da artéria principal esquerda mostrou dominância do fluxo na diástole em comparação com a da sístole. No epicárdio, foi observado fluxo venoso inverso no início da sístole. Estas formas de onda simuladas são semelhantes às da circulação coronária esquerda real observadas por investigadores fisiológicos e clínicos. Entre todos os segmentos do intramiocárdio, apenas as vênulas possuem características de resistência que variam no tempo. A partir dos resultados deste estudo, considera-se que a combinação de resistência e capacitância do vaso atua como integrador e diferenciador da pressão arterial e da pressão intramiocárdica, respectivamente, e que os efeitos da integração da pressão arterial e da diferenciação da pressão intramiocárdica desempenham um papel muito importante na determinação dos fatores que influenciam a circulação coronária esquerda.
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Tahseen EJAZ, Tadashi TAKEMAE, Yukio KOSUGI, Kazuhiro MATSUI, Shinichi OKUBO, Minoru HONGO, "Dynamic Simulation of the Left Coronary Circulation Using an Electronic Circuit Model for Coronary Vessel" in IEICE TRANSACTIONS on Information,
vol. E83-D, no. 9, pp. 1805-1813, September 2000, doi: .
Abstract: An electronic model of the coronary vessel consisting of resistor, capacitor and Field Effect Transistor (FET) is proposed in order to perform a dynamic simulation of the left coronary circulation and to clarify its mechanisms. Based on this model, an equivalent circuit of the coronary circulation is constructed that is divided into subepicardial and subendocardial layers and consists of segments of artery, arteriole, capillary, venule and vein for both the layers. In this simulation, the observed flow waveform of the left main artery showed dominance of flow in diastole as compared to that in systole. In epicardium, inverse venous flow was observed in early systole. These simulated waveforms are similar to those in real left coronary circulation observed by physiological and clinical researchers. Among all the segments of intramyocardium, only the venules were found to possess a time-varying resistance characteristics. From the results of this study, it is considered that the combination of resistance and capacitance of the vessel acts as an integrator and a differentiator for blood pressure and intramyocardial pressure, respectively and that the effects of integration of blood pressure and differentiation of intramyocardial pressure play a very important role in determining the factors influencing the left coronary circulation.
URL: https://global.ieice.org/en_transactions/information/10.1587/e83-d_9_1805/_p
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@ARTICLE{e83-d_9_1805,
author={Tahseen EJAZ, Tadashi TAKEMAE, Yukio KOSUGI, Kazuhiro MATSUI, Shinichi OKUBO, Minoru HONGO, },
journal={IEICE TRANSACTIONS on Information},
title={Dynamic Simulation of the Left Coronary Circulation Using an Electronic Circuit Model for Coronary Vessel},
year={2000},
volume={E83-D},
number={9},
pages={1805-1813},
abstract={An electronic model of the coronary vessel consisting of resistor, capacitor and Field Effect Transistor (FET) is proposed in order to perform a dynamic simulation of the left coronary circulation and to clarify its mechanisms. Based on this model, an equivalent circuit of the coronary circulation is constructed that is divided into subepicardial and subendocardial layers and consists of segments of artery, arteriole, capillary, venule and vein for both the layers. In this simulation, the observed flow waveform of the left main artery showed dominance of flow in diastole as compared to that in systole. In epicardium, inverse venous flow was observed in early systole. These simulated waveforms are similar to those in real left coronary circulation observed by physiological and clinical researchers. Among all the segments of intramyocardium, only the venules were found to possess a time-varying resistance characteristics. From the results of this study, it is considered that the combination of resistance and capacitance of the vessel acts as an integrator and a differentiator for blood pressure and intramyocardial pressure, respectively and that the effects of integration of blood pressure and differentiation of intramyocardial pressure play a very important role in determining the factors influencing the left coronary circulation.},
keywords={},
doi={},
ISSN={},
month={September},}
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TY - JOUR
TI - Dynamic Simulation of the Left Coronary Circulation Using an Electronic Circuit Model for Coronary Vessel
T2 - IEICE TRANSACTIONS on Information
SP - 1805
EP - 1813
AU - Tahseen EJAZ
AU - Tadashi TAKEMAE
AU - Yukio KOSUGI
AU - Kazuhiro MATSUI
AU - Shinichi OKUBO
AU - Minoru HONGO
PY - 2000
DO -
JO - IEICE TRANSACTIONS on Information
SN -
VL - E83-D
IS - 9
JA - IEICE TRANSACTIONS on Information
Y1 - September 2000
AB - An electronic model of the coronary vessel consisting of resistor, capacitor and Field Effect Transistor (FET) is proposed in order to perform a dynamic simulation of the left coronary circulation and to clarify its mechanisms. Based on this model, an equivalent circuit of the coronary circulation is constructed that is divided into subepicardial and subendocardial layers and consists of segments of artery, arteriole, capillary, venule and vein for both the layers. In this simulation, the observed flow waveform of the left main artery showed dominance of flow in diastole as compared to that in systole. In epicardium, inverse venous flow was observed in early systole. These simulated waveforms are similar to those in real left coronary circulation observed by physiological and clinical researchers. Among all the segments of intramyocardium, only the venules were found to possess a time-varying resistance characteristics. From the results of this study, it is considered that the combination of resistance and capacitance of the vessel acts as an integrator and a differentiator for blood pressure and intramyocardial pressure, respectively and that the effects of integration of blood pressure and differentiation of intramyocardial pressure play a very important role in determining the factors influencing the left coronary circulation.
ER -