Response of the Cardiovascular System to Vibration and Combined Stresses
Interim progress rept. 1 Oct 1979-30 Sep 1980
KENTUCKY UNIV LEXINGTON WENNER-GREN RESEARCH LAB
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Studies of the previous year indicated an inability of cardiac denervated dogs to maintain stroke volume during the positive g sub z portion of sinusoidal plus or minus 2 g sub z acceleration stress across the frequency range of 0.004 to 0.25 Hz. To investigate the inadequacy of stroke volume maintenance in these chronically instrumented animals, three cardiac dimensions have been added to provide heart volume information in addition to our standard instrumentation for measuring aortic flow and left and right ventricular and aortic arch pressures. To date, crystals have been implanted to record heart size in 27 animals 16 normal and 11 cardiac denervated whose body weights ranged from 17 to 26 kg.
- Anatomy and Physiology
- Stress Physiology