Document Detail

Thermoregulation and cardiac variability: a time-frequency analysis.
MedLine Citation:
PMID:  9603048     Owner:  NLM     Status:  MEDLINE    
High heart rate variability (HRV) has been associated with more efficient autonomic control, allowing more responsivity and sensitivity to changing environmental demands. A number of specific periodicities have been identified in the spectra of cardiac time series. A high frequency component related to respiratory sinus arrhythmia, a low frequency component related to blood pressure variability, and a very low frequency component thought to reflect thermoregulation have been reported in the literature. However, the source of the very low frequency component has not been extensively investigated in humans using non-invasive methods and analytic techniques that do not rely upon stationarity. We investigated HRV in response to both hot and cold thermal challenge in healthy adults using time-frequency analysis. This analytic technique does not rely upon signal stationarity. The results suggest that very low frequency power may reflect thermoregulation to ambient temperature changes. Implications for prediction of cardiac events are discussed.
J F Thayer; R Nabors-Oberg; J J Sollers
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biomedical sciences instrumentation     Volume:  34     ISSN:  0067-8856     ISO Abbreviation:  Biomed Sci Instrum     Publication Date:  1997  
Date Detail:
Created Date:  1998-06-26     Completed Date:  1998-06-26     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0140524     Medline TA:  Biomed Sci Instrum     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  252-6     Citation Subset:  IM    
Department of Psychology, University of Missouri-Columbia 65211, USA.
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MeSH Terms
Body Temperature Regulation*
Heart Rate*
Monitoring, Ambulatory
Signal Processing, Computer-Assisted

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

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