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Computer Simulation Analysis of Shock Intensity- and Phase- Dependence of High-Intensity DC Stimulation Aftereffects on Action Potential of Ventricular Muscle

机译:高强度直流电刺激对心室肌动作电位的冲击强度和相依性的计算机模拟分析

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摘要

The shock intensity- and phase-dependence of high-intensity DC stimulation aftereffects was studied by using Luo-Rudy's dynamic action potential model. Shock-induced transient rupture (electroporation) of the cell membrane was represented by incorporation of non-selective ionic pores. Application of DC shocks during the plateau phase caused a prolongation of the action potential. Diastolic phase shocks resulted in an activation of action potential with similar delay in repolarization. Oscillatory membrane potentials and single or multiple spontaneous excitations were induced by DC shocks with intermediate intensity and these were accompanied by activation of L-type calcium current during the plateau phase. These results are consistent with observations in animal experiments. The Luo-Rudy's dynamic action potential model with reversible electroporation-mediated pores may provide useful tools to investigate membrane potential changes and underlying ionic mechanisms following electrical shocks.
机译:利用罗-鲁迪的动态动作电位模型研究了高强度直流刺激后效的冲击强度和相位依赖性。休克诱导的细胞膜瞬时破裂(电穿孔)以非选择性离子孔的结合为代表。在平稳阶段施加直流电会延长动作电位。舒张期相休克导致动作电位激活,复极化延迟相似。振荡膜电位和单次或多次自发激发是由中等强度的直流电引起的,在高原期伴随着L型钙电流的激活。这些结果与动物实验中的观察结果一致。具有可逆电穿孔介导孔的Luo-Rudy动态动作电位模型可能提供有用的工具,以研究电击后膜电位变化和潜在的离子机制。

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