摘要
采用Greenberg-Hastings元胞自动机模型研究机械形变对心肌组织中螺旋波动力学行为的影响.数值模拟表明：对于规则网格下的稳定螺旋波,在生理性机械形变作用下,螺旋波发生漫游但不破碎;在病理性机械形变作用下,螺旋波会发生持续漫游、漫游后消失和破碎进入螺旋波湍流态三种变化.通过对比发现机械形变的振幅变化率对螺旋波的影响较大,而机械形变的角频率对螺旋波的影响较小.结合数值模拟,对心前区受到猛烈撞击会出现心颤致死及耐力运动员在发生心动过速后比一般人员更容易恢复正常进行解释.
Effect of mechanical deformation on spiral waves in myocardial tissue is studied with Greenberg-Hastings cellular automaton. It shows that for stable spiral waves existing in a regular lattices system,physiological deformation leads to meandering but not breakup of spiral waves. However,pathological deformation results in breakup,meandering,or disappearance of spiral waves.Simulation results show that spiral waves are more sensitive to amplitude than to angular frequency of mechanical deformation. The quick recovery of a sportsman after hitting on breast and fibrillation coming from violent hitting on breast was explained.
作者
张学良
谭惠丽
唐国宁
邓敏艺
ZHANG Xueliang;TAN Huili;TANG Guoning;DENG Minyi(College of Physical Science and Technology, Guangxi Normal University, Guilin 541004, China)
出处
《计算物理》
EI
CSCD
北大核心
2018年第3期294-302,共9页
Chinese Journal of Computational Physics
基金
国家自然科学基金(11365003,11565005,11647309)资助项目
关键词
元胞自动机
机械形变
螺旋波
螺旋波湍流态
cellular automata
mechanical deformation
spiral wave
spiral turbulence
