ACOUSTIC INDICES OF CARDIAC FUNCTIONALITY

Guy Amit, Jonathan Lessick, Noam Gavriely, Nathan Intrator

Abstract

The mechanical processes of the cardiac cycle generate vibratory and acoustic signals that are received on the chest wall. We describe signal processing and feature extraction methods utilizing these signals for continuous non-invasive monitoring of cardiac systolic function. Vibro-acoustic heart signals were acquired from eleven subjects during a routine pharmacological stress echocardiography test. Principal component analysis, applied to the joint time-frequency distribution of the first heart sound (S1), revealed a pattern of an increase in the spectral energy and the frequency bandwidth of the signal associated with the increase of cardiac contractility during the stress test. Novel acoustic indices of S1 that compactly describe this pattern showed good linear correlation with reference indices of systolic functionality estimated by strain-echocardiography. The acoustic indices may therefore be used to improve monitoring and diagnosis of cardiac systolic dysfunctions.

Download


Paper Citation


in Harvard Style

Amit G., Lessick J., Gavriely N. and Intrator N. (2008). ACOUSTIC INDICES OF CARDIAC FUNCTIONALITY . In Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 2: BIOSIGNALS, (BIOSTEC 2008) ISBN 978-989-8111-18-0, pages 77-83. DOI: 10.5220/0001058700770083


in Bibtex Style

@conference{biosignals08,
author={Guy Amit and Jonathan Lessick and Noam Gavriely and Nathan Intrator},
title={ACOUSTIC INDICES OF CARDIAC FUNCTIONALITY},
booktitle={Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 2: BIOSIGNALS, (BIOSTEC 2008)},
year={2008},
pages={77-83},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001058700770083},
isbn={978-989-8111-18-0},
}


in EndNote Style

TY - CONF
JO - Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 2: BIOSIGNALS, (BIOSTEC 2008)
TI - ACOUSTIC INDICES OF CARDIAC FUNCTIONALITY
SN - 978-989-8111-18-0
AU - Amit G.
AU - Lessick J.
AU - Gavriely N.
AU - Intrator N.
PY - 2008
SP - 77
EP - 83
DO - 10.5220/0001058700770083