| 心肌收缩的频率依赖性倍周期分枝 |
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| 引用本文： | 张坚松,李翔,秦晓群,瞿树林.心肌收缩的频率依赖性倍周期分枝[J].湖南师范大学自然科学学报,2002,25(2):62-64. |
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| 作者姓名： | 张坚松 李翔 秦晓群 瞿树林 |
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| 作者单位： | 1. 湖南师范大学医学院生理学教研室,中国,长沙,410006
2. 中南大学湘雅医学院生理学教研室,中国,长沙,410008 |
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| 摘 要： | 用电场刺激离体蟾蜍心肌收缩，观察到心肌收缩张力随刺激频率增大而产生倍周期分枝现象，且观察到收缩张力的递次相关，证明了心肌收缩在刺激频率达到一定水平时是一个混沌系统。对临床心衰或心律失常病人出现的交替脉现象在动力学水平作出了解释。
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| 关 键 词： | 心肌收缩 频率依赖性 倍周期分枝 混沌系统 收缩张力 收缩动力学 生理活动 |
| 文章编号： | 1000-2537(2002)02-0062-03 |
| 修稿时间： | 2002年2月18日 |
Frequence-Dependent Period-Doubling Bifurcation in Cardic Muscle’s Contraction |
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| ZHANG Jian song ,LI Xiang ,QIN Xiao qun ,QU Shu lin.Frequence-Dependent Period-Doubling Bifurcation in Cardic Muscle’s Contraction[J].Journal of Natural Science of Hunan Normal University,2002,25(2):62-64. |
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| Authors: | ZHANG Jian song LI Xiang QIN Xiao qun QU Shu lin |
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| Institution: | ZHANG Jian song 1,LI Xiang 1,QIN Xiao qun 2,QU Shu lin 1 |
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| Abstract: | The acticle investigated the contraction of isolated toad's cardic muscle strip stimulated with electric field.It was observed that contractive force of the cardic muscle increased and showed a serious of period doubling bifurcation with increase of stimulating frequency .It was also found that contractive force at each beat related with it's predecessor beat in orderly and the forces showed high to low(or low to high) altering change.The result implies that cardic contraction become to a chaotic dynamics system when frequency of stimulation reachs to some level.The result can also give an explanation to some clinical signs such as alternative pulses in heart failure or in arrhythmia. |
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| Keywords: | cardic muscle's contraction rate dependence period doubling bifurcation chaos |
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