Title :
Validating phase relations between cardiac and breathing cycles during sleep
Author :
Hoyer, D. ; Frasch, M.G. ; Eiselt, M. ; Hoyer, O. ; Zwiener, U.
Author_Institution :
Inst. for Pathophysiol., Friedrich-Schiller-Univ., Jena, Germany
Abstract :
The objective of this article is to investigate phase relations between heart beat and breathing cycles and their dependence on sleep states. Furthermore, the appearance of phase synchronizations between these signals is proved statistically by analyzing the phase relations between breathing and heart beat periods. The phase synchronizations between these signals are searched for by testing appropriate parameters of surrogate data with similar power spectra but randomly shuffled phase relations.
Keywords :
biocontrol; cardiovascular system; electrocardiography; nonlinear dynamical systems; pneumodynamics; sleep; statistical analysis; synchronisation; RR intervals; autonomic control; breathing cycles; cardiorespiratory phase synchronization; heart beat cycles; nonlinear dynamics; null hypothesis; phase relations; power spectra; randomly shuffled relations; sleep states dependence; statistical validation; surrogate data testing; systems theory approach; Cardiology; Eyes; Frequency estimation; Frequency synchronization; Heart beat; Nonlinear dynamical systems; Pacemakers; Phase estimation; Rhythm; Sleep; Biomedical Engineering; Biometry; Heart; Humans; Infant, Newborn; Models, Biological; Models, Cardiovascular; Nonlinear Dynamics; Respiratory Physiology; Sleep Stages;
Journal_Title :
Engineering in Medicine and Biology Magazine, IEEE
