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Sample-specific adaption of an improved electro-mechanical model of in vitro cardiac tissue

机译:改进的体外心脏组织机电模型的样品特异性适应性

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We present an electromechanically coupled computational model for the investigation of a thin cardiac tissue construct consisting of human-induced pluripotent stem cell-derived atrial, ventricular and sinoatrial cardiomyocytes. The mechanical and electrophysiological parts of the finite element model, as well as their coupling are explained in detail. The model is implemented in the open source finite element code Code_Aster and is employed for the simulation of a thin circular membrane deflected by a monolayer of autonomously beating, circular, thin cardiac tissue. Two cardio-active drugs, S-Bay K8644 and veratridine, are applied in experiments and simulations and are investigated with respect to their chronotropic effects on the tissue. These results demonstrate the potential of coupled micro- and macroscopic electromechanical models of cardiac tissue to be adapted to experimental results at the cellular level. Further model improvements are discussed taking into account experimentally measurable quantities that can easily be extracted from the obtained experimental results. The goal is to estimate the potential to adapt the presented model to sample specific cell cultures. (C) 2016 Elsevier Ltd. All rights reserved.
机译:我们提出了一种机电耦合的计算模型,用于研究由人诱导的多能干细胞衍生的心房,心室和窦房心肌细胞组成的薄心脏组织构造。详细解释了有限元模型的机械和电生理部分,以及它们的耦合。该模型在开源有限元代码Code_Aster中实现,并用于模拟由自动跳动的圆形薄心脏组织单层偏转的圆形薄膜。在实验和模拟中使用了两种心脏活性药物S-Bay K8644和veratridine,并研究了它们对组织的变时性作用。这些结果证明了心脏组织的微观和宏观机电模型耦合在细胞水平适应实验结果的潜力。考虑到可以从获得的实验结果中轻松提取出的实验可测量量,讨论了进一步的模型改进。目的是评估将提出的模型用于样品特定细胞培养的潜力。 (C)2016 Elsevier Ltd.保留所有权利。

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