Document Detail

Arnold tongues in human cardiorespiratory systems.
MedLine Citation:
PMID:  15003038     Owner:  NLM     Status:  MEDLINE    
Arnold tongues are phase-locking regions in parameter space, originally studied in circle-map models of cardiac arrhythmias. They show where a periodic system responds by synchronizing to an external stimulus. Clinical studies of resting or anesthetized patients exhibit synchronization between heart-beats and respiration. Here we show that these results are successfully modeled by a circle-map, neatly combining the phenomena of respiratory sinus arrhythmia (RSA, where inspiration modulates heart-rate) and cardioventilatory coupling (CVC, where the heart is a pacemaker for respiration). Examination of the Arnold tongues reveals that while RSA can cause synchronization, the strongest mechanism for synchronization is CVC, so that the heart is acting as a pacemaker for respiration.
Mark McGuinness; Young Hong; Duncan Galletly; Peter Larsen
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chaos (Woodbury, N.Y.)     Volume:  14     ISSN:  1054-1500     ISO Abbreviation:  Chaos     Publication Date:  2004 Mar 
Date Detail:
Created Date:  2004-03-08     Completed Date:  2004-05-11     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  100971574     Medline TA:  Chaos     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1-6     Citation Subset:  IM    
Copyright Information:
Copyright 2004 American Institute of Physics.
School of Mathematical and Computing Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand.
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MeSH Terms
Arrhythmia, Sinus / physiopathology*
Biological Clocks*
Cardiovascular Physiological Phenomena*
Computer Simulation
Heart Rate*
Models, Cardiovascular*
Respiratory Mechanics
Respiratory Physiological Phenomena*
Vagus Nerve / physiopathology

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

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