Examining the Effect of Introducing a Link From Electrical Excitation to Calcium Dynamics in a Cardiomyocyte

Examining the Effect of Introducing a Link From Electrical Excitation to Calcium Dynamics in a Cardiomyocyte
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检查在心肌细胞中引入从电激励到钙动力学的联系的效果

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发表时间:
2016
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通讯作者:
Zana Coulibaly
Zana Coulibaly
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作者:
Kallista Angeloff;C. Barajas;Alexander Middleton;Uchenna Osia;Jonathan S. Graf;M. Gobbert;Zana Coulibaly

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通讯作者:Matthias K. Gobbert 教授,马里兰大学数学与统计系,巴尔的摩县,1000 Hilltop Circle,巴尔的摩,MD 21250,美国 gobbert@umbc.edu 摘要 钙失调是致命性心律失常的一个重要原因,但这是一种不完全了解的现象且难以预测。心脏钙水平可以建模为一个偏微分方程系统,将心脏的电激励、钙信号传导和机械收缩动力学联系起来。完整的钙诱导钙释放模型使用反应扩散方程将这三个系统完全联系起来。模拟检查了引入钙信号传导与电激发之间的联系的效果。特别是,我们对钙信号传导和电激发之间的反馈连接强度进行了参数研究。模拟表明,电激发和钙信号之间的反馈和前馈可以以生理上真实的方式影响电压。
Correspondence: Prof. Matthias K. Gobbert, Dept. of Mathematics and Statistics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA gobbert@umbc.edu Abstract Calcium dysregulation is a significant cause of fatal cardiac arrythmias, but it is an incompletely understood phenomenon and difficult to predict. Cardiac calcium levels can be modeled as a system of partial differential equations linking the electrical excitation, calcium signaling, and mechanical contraction dynamics of the heart. A complete calcium induced calcium release model uses reaction-diffusion equations to fully link these three systems. Simulations examine the effect of introducing the link from calcium signaling to electrical excitation. In particular, we perform a parameter study on the strength of the feedback connection with both links between calcium signaling and electrical excitation enabled. Simulations indicate that the feedback and feedforward between electrical excitation and calcium signaling can influence the voltage in a physiologically realistic way.
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