Detection of coronary artery disease with an electronic stethoscope

A noninvasive method for detection of coronary artery disease (CAD) with an electronic stethoscope is proposed. Heart sounds recorded in clinical settings are often contaminated with background noise and noise caused by friction between the skin and the stethoscope. A method was developed to reduce...

Full description

Saved in:
Bibliographic Details
Main Authors: Schmidt, S.E., Holst-Hansen, C., Graff, C., Toft, E., Struijk, J.J.
Format: Conference Proceeding
Language:English
Subjects:
Acoustic noise
Background noise
Coronary arteriosclerosis
Energy states
Friction
Heart
Noise level
Noise reduction
Skin
Stethoscope
Citations: Items that cite this one
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A noninvasive method for detection of coronary artery disease (CAD) with an electronic stethoscope is proposed. Heart sounds recorded in clinical settings are often contaminated with background noise and noise caused by friction between the skin and the stethoscope. A method was developed to reduce the influence of the noise artifacts. The diastolic parts of the heart sounds were divided into multiple sub-segments, where noisy sub-segments were indentified as sub-segments with a low degree of stationarity or with a high energy level. The sub-segments not identified as noisy were analyzed with an autoregressive (AR) model, where the pole-magnitude of the 1 st pole was used as a discriminating parameter. A test on 50 subjects showed that removal of the noisy sub-segments before analyses improved the diagnostic performance of the AR-model considerably, thereby reducing the influence of noise related to the use of a handhold stethoscope.
ISSN:0276-6574
2325-8853
DOI:10.1109/CIC.2007.4745596