| HRV的最大李雅普诺夫指数估计 |
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| 引用本文： | 韩清鹏,王平.HRV的最大李雅普诺夫指数估计[J].生物医学工程学杂志,2007,24(4):732-735. |
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| 作者姓名： | 韩清鹏 王平 |
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| 作者单位： | 1. 浙江大学,生物医学工程系,杭州,310027;扬州大学,环境科学与工程学院,扬州,225009
2. 浙江大学,生物医学工程系,杭州,310027 |
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| 摘 要： | 对心率变异性(HRV)进行了研究,比较了心率正常者与心率失常者HRV之间的最大李雅普诺夫指数上的差别。人在正常状态和病理状态下的HRV信号最大李雅普诺夫指数是不同的,当出现病理心血管事件时,指数α减少,因此李雅普诺夫指数可作为人体是否异常或处于何种异常状态的特征刻画指标,本文心率正常者HRV信号的最大李雅普诺夫指数为0.45907,心率不齐者的最大李雅普诺夫指数是0.41472。它们均为混沌信号,但是处于心率不齐状态的节律混沌程度明显比处于心率正常状态的节律混沌程度低。
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| 关 键 词： | 李雅普诺夫指数 心率变异性 混沌 |
| 修稿时间： | 2005-03-142005-06-17 |
Estimation of the Largest Lyapunov Exponent of the HRV Signals |
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| Han Qingpeng,Wang Ping.Estimation of the Largest Lyapunov Exponent of the HRV Signals[J].Journal of Biomedical Engineering,2007,24(4):732-735. |
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| Authors: | Han Qingpeng Wang Ping |
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| Institution: | 1.School of Biomedical Engineering, Zhejiang University, Hangzhou 310027,China; 2.School of Environmental Science and Engineering, Yangzhou University,Yangzhou 225009,China |
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| Abstract: | Using non-linear dynamics methods, we have comparatively analyzed the HRV (heart rate variability ) of the healthy people and the HRV of those with arrhythmia. The Lyapunov exponent of the healthy group's HRV is different from that of the arrhythmia group's HRV. The largest Lyapunov exponent of the healthy people's HRV is 0.45907. But in the abnormal situation, the value of a reduces, and the largest Lyapunov exponent of the arrhythmia group's HRV is 0. 41472. They are both chaotic system, however the level of the chaos of those with arrhythmia is apparently lower than that of the healthy people. |
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| Keywords: | Lyapunov exponent Heart rate variability (HRV) Chaotic system |
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