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J Appl Physiol 42: 682-689, 1977;
8750-7587/77 $5.00
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Journal of Applied Physiology, Vol 42, Issue 5 682-689, Copyright © 1977 by American Physiological Society

ARTICLES

Parameters for assessing vibration-induced cardiovascular responses in awake dogs

A. Bhattacharya, C. F. Knapp, E. P. McCutcheon and R. G. Edwards

The vibration parameters for assessing the response of the cardiovascular system to whole-body vibration were studied. Six awake, chronically instrumented canines were restrained with their spines vertical, and exposed to GZ sinusoidal vibration of 2-12 HZ for a constant peak acceleration amplitude of +-1.0 G. Vibration exposures of 30 s with intervening recovery periods of 2 min were employed. The following variables were measured: mean heart rate (MHR), stroke volume (SV), mean aortic flow (MAF), mean aortic pressure (MAP), the peak net force transmitted to the canine/body weight (PNF/BW), and the vibration platform frequency (ft), displacement, and acceleration. The percentage change from control (no vibration) of MAF varied linearly with PNF/BW for all cases. MAF also varied linearly with the log MHR/ft for the number of dogs which primarily changed MHR during the vibration exposures. The response of MAP was minimal in all cases, indicating a decrease in total peripheral resistance with increasing PHF.




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