基于混沌理论的心音信号非线性动力学分析  

Nonlinear dynamic analysis of heart sound signals based on chaos theory

作　　者：丁晓蓉[1] 郭兴明[1] 钟丽莎[1] 

机构地区：[1]重庆大学生物工程学院,重庆400044

出　　处：《振动与冲击》2012年第15期55-59,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(30770551);中央高校基本科研业务费资助(CDJXS10 23 00);重庆市科委新型医疗器械重大科技专项资助项目(CSTC;2008AC5103)

摘　　要：为了从非线性动力学的角度对心音进行分析,提出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。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.

关 键 词：混沌 心音 二尖瓣狭窄 关联维数 递归图 

分 类 号：R318.04[医药卫生—生物医学工程]