CARDIAC BEAT DETECTOR - A Novel Analogue Circuitry for the First Heart Sound Discrimination

Shinichi Sato

2008

Abstract

Cardiac beat detector, which is an analogue circuitry installed in a novel non-invasive system for measuring heart rate in mice by using a piezoelectric transducer (PZT) sensor, performs an critical role in detecting the first heart sound (S1) in heart sounds. The PZT sensor detects heartbeat vibration and converts it to an electrical signal, namely the heart sounds. The measurement in intervals of S1s in the heart sounds is required to calculate heart rate, however, it is not simple because a S1 is a vibrating signal and has multiple peaks, which fluctuate in interval and in magnitude. In addition, respiration sound noise, which has frequency components similar with that of S1, makes S1 detection difficult and complex. The cardiac beat detector made it possible to overcome these problems by transforming multi-peaked S1 signal into a quasi-digital pulse. This technique is also available for the use in humans. Thus, the cardiac beat detector would contribute to the progress in the non-invasive heart rate measurement when it is installed in various, novel phonocardiogram-based equipments for the use in the fields of clinical and basic science in medicine.

Paper Citation

in Harvard Style

Sato S. (2008). CARDIAC BEAT DETECTOR - A Novel Analogue Circuitry for the First Heart Sound Discrimination . 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 136-140. DOI: 10.5220/0001069501360140

in Bibtex Style

@conference{biosignals08,
author={Shinichi Sato},
title={CARDIAC BEAT DETECTOR - A Novel Analogue Circuitry for the First Heart Sound Discrimination},
booktitle={Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 2: BIOSIGNALS, (BIOSTEC 2008)},
year={2008},
pages={136-140},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001069501360140},
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 - CARDIAC BEAT DETECTOR - A Novel Analogue Circuitry for the First Heart Sound Discrimination
SN - 978-989-8111-18-0
AU - Sato S.
PY - 2008
SP - 136
EP - 140
DO - 10.5220/0001069501360140