STFT-Based Comparative Studies of Heart Sound Signals
The paper is focused on analyzing 20 heart sound samples, including patients with coronary disease and healthy persons. Short Time Flourier Transform(STFT) is adopted for the analysis, since Flourier Transform (FT) has its limitations as a tool in analyzing heart sound signals which as biological signals are weak and nonstable. The study demonstrates that the heart sounds of patients with coronary disease, including those with atrial septal defects, exhibit markedly different characteristics from those of healthy persons. Specifically, the first heart sound (S1) is closely followed by a systolic murmur of high frequency; a persistent splitting of the second heart sound (S2) is observed, which is accompanied by a diastolic murmur. It is therefore concluded that the frequency changes and structure of cardiac sounds are mainly related to the health of the heart and basically free from the influences of individual differences.
Heart Sound Signals STFT Cardiovascular Disease Non-invasive Diagnosis Signal Processing
Chen Tian-hua Han Li-qun Xing Su-xia Wang Hai-ran Wang Kun-peng
College of Information Engineering,Beijing Technology and Business University Beijing 100037,Peoples Republic of China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）