Heart sound measurement and analysis system with a stethoscope.
- Author:
Haibin WANG
1
;
Zhongwei JIANG
;
Xiucheng DONG
;
Samjin CHOI
;
Junqi ZHANG
;
Shuping SUN
Author Information
1. School of Electrical and Information Engineering, Xihua University, Chengdu 610039, China. ddwang.kr987@yahoo.com.cn
- Publication Type:Journal Article
- MeSH:
Algorithms;
Heart Auscultation;
Heart Sounds;
physiology;
Humans;
Signal Processing, Computer-Assisted;
Software Design;
Stethoscopes
- From:
Journal of Biomedical Engineering
2009;26(2):282-287
- CountryChina
- Language:Chinese
-
Abstract:
This paper is composed with the cardiac sound measurement and analysis system for in-home use of heart abnormality monitoring. The heart sound acquiring system is composed of a traditional chest-piece, earphone, microphone, and IC recorder. The recorded data is transmitted to a computer by USB interface for analysis based on the cardiac sound characteristic waveform (CSCW) method, which is extracted from an analytical model of single degree-of-freedom (SDOF). Furthermore, the characteristic parameters [T1, T2, T11, T12] are defined by the time intervals between the crossed points of the CSCW and a threshold value (THV), which are related to the first sound and the second sound and are used for discriminating normal and abnormal heart sounds. Also, an easy-understanding graphical representation for these parameters is considered, so that, even for an inexperienced user, he or she is able to monitor his or her cardiac status easily. Finally, a case study on the abnormal/normal cardiac sounds is demonstrated to validate the usefulness and efficiency of this proposed system and the cardiac sound characteristic waveform method.
