Effect of stress on variability of systemic hemodynamics in rats of various genetic strains

Power spectral density of heart rate fluctuations in the range of 0.02-5.00 Hz in August rats was lower than in Wistar rats. Changes in mean blood pressure and heart rate during stress (15-min immobilization) were similar in animals of both strains. As differentiated from Wistar rats, power spectral...

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Bibliographic Details
Published in:Bulletin of experimental biology and medicine 2003-09, Vol.136 (3), p.235-238
Main Authors: Belkina, L M, Tarasova, O S, Kirillina, T N, Borovik, A S, Popkova, E V
Format: Article
Language:English
Subjects:
Animals
Arrhythmias, Cardiac - pathology
Male
Myocardial Ischemia - pathology
Rats
Rats, Wistar
Species Specificity
Stress, Physiological
Sympathetic Nervous System - pathology
Time Factors
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Summary:Power spectral density of heart rate fluctuations in the range of 0.02-5.00 Hz in August rats was lower than in Wistar rats. Changes in mean blood pressure and heart rate during stress (15-min immobilization) were similar in animals of both strains. As differentiated from Wistar rats, power spectral density of fluctuations in August rats considerably decreased after stress. August rats were characterized by low spectral power at rest and high resistance to the arrhythmogenic effect of 10-min acute myocardial ischemia.
ISSN:0007-4888
1573-8221
DOI:10.1023/B:BEBM.0000008971.63398.46