Document Detail

Thermoregulation and heart rate variability.
MedLine Citation:
PMID:  8829887     Owner:  NLM     Status:  MEDLINE    
1. Heart rate variability is modulated by multiple control systems, including autonomic and hormonal systems. Long-term variability, i.e. the very low-frequency band of the power spectra, has been postulated to reflect thermoregulatory vasomotor control, based upon thermal entrainment experiments. However, the relationship between thermoregulatory responses (vasoconstriction and shivering) and heart rate variability has not been studied. 2. We performed two distinct protocols in a series of human subjects. In the first protocol, core temperature was reduced by intravenous infusion of cold saline, while skin temperature was unchanged. The second protocol involved skin-surface warming and cooling until shivering developed. Power spectral analysis was performed using a fast Fourier transformation, and the area in three distinct band-widths was determined. 3. Very low-frequency power (0.0039-0.04 Hz) increased significantly in response to core cooling, peripheral vasoconstriction and shivering, while both very low- and low- (0.04-0.15 Hz) frequency power increased in response to skin-surface cooling. Heart rate decreased during core cooling-induced vasoconstriction, suggesting a direct thermal response, and increased in relation to the metabolic demands associated with shivering. 4. Our results suggest that very low-frequency power is modulated by thermal stimuli which result in core hypothermia and thermoregulatory activity, while skin-surface cooling without core hypothermia does not selectively modulate this frequency band.
L A Fleisher; S M Frank; D I Sessler; C Cheng; T Matsukawa; C A Vannier
Related Documents :
8324377 - Time and frequency domain assessment of heart rate variability: a theoretical and clini...
8760187 - Bidirectional augmentation of heart rate regulation by autonomic nervous system in rabb...
19535677 - Discharge properties of cardiac and renal sympathetic nerves and their impaired respons...
20631797 - Striations, duration, migration and tidal response in deep tremor.
9199697 - Unconditional discrimination as a paradigm for investigating visual processing in the a...
23433277 - Writing forces associated with four pencil grasp patterns in grade 4 children.
Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Clinical science (London, England : 1979)     Volume:  90     ISSN:  0143-5221     ISO Abbreviation:  Clin. Sci.     Publication Date:  1996 Feb 
Date Detail:
Created Date:  1996-10-16     Completed Date:  1996-10-16     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7905731     Medline TA:  Clin Sci (Lond)     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  97-103     Citation Subset:  IM    
Department of Anaesthesiology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Body Temperature Regulation / physiology*
Heart Rate / physiology*
Hypothermia, Induced
Grant Support

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

Previous Document:  Unique response of human arteries to endothelin B receptor agonist and antagonist.
Next Document:  Comparison of azelastine nasal spray and oral ebastine in treating seasonal allergic rhinitis.