老年人第三第四心音信号小波变换时频分析研究  

A Wavelet Transform Time Frequency Analysis of the Third and Fourth Heart Sound of Old People

作　　者：刘毅[1] 邵庆余[1] 李桥[1] 朱兴雷[1] 张玉华[1] 孟延 赵玲[1] 李新[1] 周红军 

机构地区：[1]山东医科大学生物医学工程研究室,济南250012 [2]山东省立医院心内科

出　　处：《北京生物医学工程》2000年第1期42-44,共3页Beijing Biomedical Engineering

基　　金：山东省科委基金!资助项目 (951156202)

摘　　要：用小波变换时频分析的方法对老年人的第三第四心音进行了分析研究， 在心前区采集心音数据， 为对心音定位， 同步采集了一导心电信号。本研究对３０例正常老年人（年龄在５０～６９岁） 和４０例冠心病老年人（年龄在５３～８５岁） 的第三第四心音数据进行了统计分析， 发现正常老年人Ｓ３的频谱主峰频率与冠心病老年人Ｓ３的频谱主峰频率有明显的差异。由于Ｓ３和Ｓ４的幅度和频率都很低， 用听诊方法常被漏掉。The wavelet transform time-frequency analysis method was used to detected the S3 and S4. The heart sounds data was sampled at the precardium, and Lead I of the ECG was recorded simultaneously to label the heart sounds. The sampling rate was 1000Hz. Statistics of the third and fourth heart sounds data of 30 normal old subjects (age from 50～69) and 40 old subjects with coronary heart diseases(age from 53～85) were analysed. Significantly difference was found between the main peak's frequencies of S3 of normal old subjects and those of old subjects with coronary heart diseases. Since amplitudes frequencies of S3 and S4 are quite low, so they are often missed when diagnosing. The results showed it is a new way to diagnose cardiovascular diseases.

关 键 词：心音 小波变换 时频分析 心脏病 诊断 老年人 

分 类 号：R318.04[医药卫生—生物医学工程] R540.4[医药卫生—基础医学]