English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

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 quasidigital 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.

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