| 基于混沌理论的心音信号非线性动力学分析 |
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| 引用本文： | 丁晓蓉,郭兴明,钟丽莎. 基于混沌理论的心音信号非线性动力学分析[J]. 振动与冲击, 2012, 31(15): 55-59. DOI: |
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| 作者姓名： | 丁晓蓉 郭兴明 钟丽莎 |
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| 作者单位： | 重庆大学 生物工程学院, 重庆 400044 |
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| 基金项目： | 国家自然科学基金，中央高校基本科研业务费资助，重庆市科委新型医疗器械重大科技专项资助项目 |
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| 摘 要： | 摘要：为了从非线性动力学的角度对心音进行分析，提出了一种基于混沌理论的心音信号的分析方法。首先，计算心音信号的关联维数及最大Lyapunov指数，获取了心音信号递归图和递归定量分析参数；然后，通过13例健康人和13例二尖瓣狭窄病人的心音对其进行分析验证。结果表明：正常及二尖瓣狭窄心音信号的混沌特征具有显著性差异，该方法为实现二尖瓣狭窄的早期辅助诊断提供了依据。
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| 关 键 词： | 混沌 心音 二尖瓣狭窄 关联维数 递归图 |
| 收稿时间： | 2011-04-07 |
| 修稿时间： | 2011-09-01 |
Nonlinear dynamic analysis of heart sound signals based on chaos theory |
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| DING Xiao-rong , GUO Xing-ming , ZHONG Li-sha. Nonlinear dynamic analysis of heart sound signals based on chaos theory[J]. Journal of Vibration and Shock, 2012, 31(15): 55-59. DOI: |
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| Authors: | DING Xiao-rong GUO Xing-ming ZHONG Li-sha |
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| Affiliation: | College of Bioengineering, Chongqing University, Chongqing 400044，China |
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| Abstract: | In order to get more valuable information from the perspective of nonlinear dynamics,a method based on chaos theory was proposed to analyze the heart sound signals.The correlation dimension and largest Lyapunov exponent were calculated,besides,the recurrence plot and its quantification analysis parameters were obtained and used to study the heart sounds of 13 cases of normal people and 13 cases of patients with mitral stenosis.The results show that the difference between the chaotic features of the normal heart sounds and of the sounds with mitral stenosis is significant.Thus,the method can be applied to assist the diagnosis of mitral stenosis. |
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| Keywords: | chaos heart sound mitral stenosis correlation dimension recurrence plot |
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