Cellular automata model of cardiac excitation waves

Cellular automata model of cardiac excitation waves
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心脏激励波的元胞自动机模型

DOI:
10.1007/s003990050052
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发表时间:
1999
影响因子:
--
通讯作者:
R. Cohen
R. Cohen
中科院分区:
--
文献类型:
--
作者:
A. Feldman;Y. Chernyak;R. Cohen

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摘要 我们提出了一种新的计算机模拟技术,适用于快速、定量可靠地模拟各向异性心肌中传播的激励波。我们的模型采用有限元或元胞自动机 (CA) 方法,其中元素根据特定规则在有限数量的状态(例如,激发、不应)之间进行转换。使用控制组织中给定点处的传播的特征关系(例如各向异性比和平面波速度对舒张间隔的依赖性)来计算每个位置处的 CA 元素的过渡参数值。该模型非常适合分析心律失常发生和假设的治疗干预措施。一旦确定了抗心律失常药物或疾病过程对不同心肌细胞类型的特征关系的影响,我们的模型就可以模拟具有修改特性的组织中的电活动。在本文中,我们讨论该模型的基本结构,并用它来演示在存在钠通道阻滞剂的情况下具有固定疤痕(梗塞)的心肌中小波的形成。这种机制可能有助于解释这些药物的致心律失常作用。
Summary We present a new computer simulation technology suitable for rapid and quantitatively reliable simulation of propagating excitation waves in anisotropic myocardium. Our model utilizes a finite element or cellular automata (CA) approach in which the elements undergo transitions between a finite number of states (e.g., excited, refractory) according to specific rules. The transition parameter values for the CA elements at each location are computed using the characteristic relations governing propagation at the given point in the tissue, such as the anisotropy ratio and the dependence of the plane wave speed on diastolic interval. The model is well-suited for analysis of arrhythmogenesis and hypothetical therapeutic interventions. Once the effects of an antiarrhythmic drug or disease process on the characteristic relationships have been determined for different cardiac cell types, the electrical activity in tissue with the modified properties can be simulated by our model. In this article, we discuss the basic structure of the model and use it to demonstrate wavelet formation in myocardium with a fixed scar (infarct) in the presence of a sodium channel blocker. This mechanism may help explain the proarrhythmic effects of these agents.
DOI: 10.1161/01.res.68.6.1501
发表时间: 1991-06-01
影响因子: 20.1
作者:
LUO, CH;RUDY, Y
通讯作者: RUDY, Y
DOI: 10.1016/s0006-3495(96)79624-8
发表时间: 1996-02
影响因子: 3.4
作者:
J. Starobin;Y. Zilberter;E. M. Rusnak;C. Starmer
通讯作者: J. Starobin;Y. Zilberter;E. M. Rusnak;C. Starmer
合胞体组织的均质化。
DOI: --
发表时间: 1993
影响因子: --
作者:
Neu,JC;Krassowska,W
通讯作者: Krassowska,W
DOI: 10.1152/ajpheart.1993.265.6.h2117
发表时间: 1993-12
期刊: The American journal of physiology
影响因子: --
作者:
C. Nordin
通讯作者: C. Nordin
DOI: 10.1016/s0006-3495(89)82897-8
发表时间: 1989-05-01
影响因子: 3.4
作者:
SEPULVEDA, NG;ROTH, BJ;WIKSWO, JP
通讯作者: WIKSWO, JP