[Development of heart sound signal detection system based on USB interface].
This paper introduces a type of heart sound recording, analysis and processing system based on USB interface. The system consists of high performance sensor sampling heart sounds, the preprocessing circuit, the A/D conversion module and the USB based high-speed computer communications interface. The experiments show that it is noninvasive, convenient, inexpensive and rapid in detecting the cardiac contractility of patients with heart disease as well as of healthy subjects. This system has provided a reliable technical platform for evaluating the cardiac contractility reserve.
Ji
An
A
College of Bioengineering, Chongqing University, Chongqing 400044, China.
Guo
Xingming
X
Guo
Weizhen
W
Xiao
Shouzhong
S
D017076:Computer-Aided Design; D004867:Equipment Design / Q000295:instrumentation; D006347:Heart Sounds / Q000502:physiology*; D006801:Humans; D010701:Phonocardiography / Q000295:instrumentation* / Q000379:methods; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*