Heart rate variability as an index of physiological strain in hyperthermic and dehydrated rats

Telemetry-equipped rats were subjected to hyperthermia (H, T c=41.5°C) with and without dehydration (D, 9% loss of body weight) stresses. Time domain and spectral analysis of heart rate variability indicated that the dehydrated hyperthermic (DH) rats had increased sympathetic activity compared to H...

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Bibliographic Details
Published inJournal of thermal biology Vol. 29; no. 4; pp. 211 - 219
Main Authors Matthew, Candace B, Bastille, Amy M, Gonzalez, Richard R, Sils, Ingrid V, Hoyt, Reed W
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.05.2004
Subjects
Autonomic nervous system
Central control of cardiac frequency
Dehydration
Heart rate variability
Hyperthermia
Dehydration
Autonomic nervous system
Hyperthermia
Heart rate variability
Central control of cardiac frequency
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Summary:Telemetry-equipped rats were subjected to hyperthermia (H, T c=41.5°C) with and without dehydration (D, 9% loss of body weight) stresses. Time domain and spectral analysis of heart rate variability indicated that the dehydrated hyperthermic (DH) rats had increased sympathetic activity compared to H rats, and DH rats had decreased parasympathetic activity compared to less hyperthermic D rats. These non-invasive measures of physiological strain discriminated the more physiologically stressful of these states.
ISSN:0306-4565
1879-0992
DOI:10.1016/j.jtherbio.2004.03.001