心脏记忆对螺旋波动力学的影响  

Effect of Cardiac Memory on Spiral Wave

作　　者：黄雯[1] 谭惠丽[1] 

机构地区：[1]广西师范大学物理科学与技术学院,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2017年第2期1-8,共8页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金(11365003)

摘　　要：如何消除心脏螺旋波和防止螺旋波破碎是目前的一个研究热点,但关于心脏记忆对螺旋波的作用方面的研究则很少。本文建立了带记忆的心脏二维元胞自动机模型,研究激发概率和记忆时长对心脏螺旋波的影响。数值模拟结果发现:在GH模型产生的规则螺旋波上加入记忆和随机激发概率以后一般会出现螺旋波漫游、破碎甚至消失等现象。系统的激发性在一定条件下会随记忆时长的增大而增加,随激发概率的增大而增大。在一定的条件下,若控制随机激发概率在一定范围内,或者控制记忆时长,可达到消除心脏螺旋波的目的,为防治心脏病提供一定的理论依据。How to eliminate the spiral wave of the heart and prevent the spiral wave is a hotspot, but there is little research on the role of heart memory in the spiral wave. A two-dimensional cellular automata model for a heart with memory is presented. The effects of excitation probability and the length of memory time are studied.The computer simulations show that when cardiac memory and the excitation probability apply to the stable spiral wave formed by a GH model, the spiral wave will meander, breakup or disappear. The excitability of the system will be increased with the increase of the length of memory time and the excitation probability. Under certain conditions, if the excitation probability and the length of memory time are controlled within proper values, the goal to eliminate spiral wave will be reached. The study provides a theoretical basis for the prevention and treatment of heart disease.

关 键 词：元胞自动机 激发介质 螺旋波 心脏记忆 心脏病 

分 类 号：O411.3[理学—理论物理]