【摘要】 通过自行研制的硬件系统,在心前区采集心音数据,并采集一导心电信号来定位心音。用小波变换时频分析方法,对各年龄段正常人和冠心病老年人的低频心音段的第三(S3)、第四(S4)心音进行了分析研究,得出了所有正常人均有S3,S4,并且正常老年人与老年一般冠心病患者S3的频谱主峰频率存在明显差异(p=0.0164)的结论,表明S3的检测有重要的临床诊断意义。更多还原

【Abstract】 The system devised by ourselves is used to detect the Heart Sound(HS) signal. The HS data was sampled at the precardium, and Lead I of the ECG was recorded simultaneously to label the heart sound. Using wavelet transform and timefrequency analysis method, the S3 and S4 of normal children, normal adults, normal elder and old subjects with Coronary Heart Diseases(CHD) were statistically analyzed. The results indicated that all normal persons has S3 and S4, and the significant difference(p=0.0164) was found in main peak frequencies of S3 between normal elder and old group with CHD. It shows that S3 is helpful in diagnosis the cardiovascular diseases.更多还原