Document Detail

Time-variant parametric estimation of transient quadratic phase couplings between heart rate components in healthy neonates.
MedLine Citation:
PMID:  17093954     Owner:  NLM     Status:  MEDLINE    
The heart rate variability (HRV) can be taken as an indicator of the coordination of the cardio-respiratory rhythms. Bispectral analysis using a direct (fast Fourier transform based) and time-invariant approach has shown the occurrence of a quadratic phase coupling (QPC) between a low-frequency (LF: 0.1 Hz) and a high-frequency (HF: 0.4-0.6 Hz) component of the HRV during quiet sleep in healthy neonates. The low-frequency component corresponds to the Mayer-Traube-Hering waves in blood pressure and the high-frequency component to the respiratory sinus arrhythmia (RSA). Time-variant, parametric estimation of the bispectrum provides the possibility of quantifying QPC in the time course. Therefore, the aim of this work was a parametric, time-variant bispectral analysis of the neonatal HRV in the same neonates used in the direct, time-invariant approach. For the first time rhythms in the time course of QPC between the HF component and the LF component could be shown in the neonatal HRV.
K Schwab; M Eiselt; P Putsche; M Helbig; H Witte
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-11-09
Journal Detail:
Title:  Medical & biological engineering & computing     Volume:  44     ISSN:  0140-0118     ISO Abbreviation:  Med Biol Eng Comput     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2007-07-09     Completed Date:  2007-12-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7704869     Medline TA:  Med Biol Eng Comput     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1077-83     Citation Subset:  IM    
Institute of Medical Statistics, Computer Sciences and Documentation, Medical Faculty of the Friedrich Schiller University Jena, Bachstr. 18, 07740 Jena, Germany.
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MeSH Terms
Arrhythmia, Sinus / physiopathology
Blood Pressure / physiology
Heart Rate / physiology*
Infant, Newborn
Sleep / physiology
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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