Technique for the quantification of transient quadratic phase couplings between heart rate components

Biomedizinische Technik. Biomedical Engineering
H WitteB Schack

Abstract

A technique for the time-variant analysis of quadratic phase coupling (QPC) in heart rate data is introduced and tested in 6 human neonates during quiet sleep. The set up of the approach is based up on the assumption that QPCs in the heart rate variability (HRV) are related to amplitude modulation effects. The application of the biamplitude deals with the detection of the coupling pattern and the bicoherence is used for the statistical quantification of coupling. By means of the results of bispectral analysis the time-variant processing has been adapted. The frequency-selective complex demodulation of the HRV leads to the envelope of the respiratory sinus arrhythmia (RSA), this has been used as one input for a time-variant coherence analysis. The other input is the low-pass filtered 10-second-rhythm of the HRV. A time-continuous quantification of the QPC, caused by amplitude modulation (10-second-rhythm modulates the RSA), is possible using this approach. According to our observed results in neonatal HRV both a phase co-ordination between the 10-second-rhythm and RSA as well as a non-linear coupling (amplitude modulation) between these HRV components can be seen.

Citations

Nov 18, 2006·Medical & Biological Engineering & Computing·U Rajendra AcharyaJasjit S Suri
Feb 26, 2008·Journal of Medical Engineering & Technology·K C ChuaC M Lim
Apr 29, 2008·Neuroscience Letters·Klaus PfurtschellerGert Pfurtscheller
Mar 3, 2015·IEEE Transactions on Bio-medical Engineering·Karin SchieckeHerbert Witte
May 23, 2014·IEEE Transactions on Bio-medical Engineering·Karin SchieckeHerbert Witte
Sep 8, 2004·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·H WitteT Suesse

❮ Previous
Next ❯

Related Concepts

Related Feeds

Arrhythmia

Arrhythmias are abnormalities in heart rhythms, which can be either too fast or too slow. They can result from abnormalities of the initiation of an impulse or impulse conduction or a combination of both. Here is the latest research on arrhythmias.

Atrial Fibrillation

Atrial fibrillation is a common arrhythmia that is associated with substantial morbidity and mortality, particularly due to stroke and thromboembolism. Here is the latest research.