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中文摘要：
心脏中的心肌组织是一种典型的可激发介质，鉴于心肌细胞分布的离散性，采用离散可激发介质模型研究了不应态时间随机扰动对螺旋波动力学行为的影响，在扰动随机出现情况下，螺旋波的稳定性与受扰元胞的数目和扰动幅度有关，数值计算结果表明：在适当的条件下，可以观察到螺旋波漫游、破碎和消失现象，并简要分析了产生这些现象的机理。
英文摘要：
The cardiac muscle, which is composed of many discrete cells, is a typical excitable medium. In this paper, we study the effect of refractory period with stochastic perturbations on dynamical behaviors of spiral wave using the model of discrete excitable medium. When the perturbations are random in space, the stability of spiral wave is related to the amplitude of the perturbations and the number of perturbation cells. Computer simulation results show that refractory period perturbations can result in meandering, breakup and disappearance of the spiral waves under suitable conditions, and then their mechanisms are analyzed.
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