Volume Conditioned Stimuli Affecting Salt and Water Excretion.
Final scientific rept. 1 Jul 71-30 Nov 74,
FREIE UNIVERSITAET BERLIN (WEST GERMANY) PHYSIOLOGISCHES INSTITUT
Pagination or Media Count:
An effort was made to quantitatively analyse the mechanics of cardiac distension during whole body immersion which represents the stimulus for the volume conditioned reflex. Equipment was built which allowed immersion of the upright sitting subject together with the measuring devices. A second tank was constructed for the rontgenometric determination of heart volume when changing from standing in air to standing in water up to the neck. The main results were that heart size increases by 180 ml range 120-320 ml and central venous pressure to 15 mmHg. This is followed by a reflex fall of arterial flow resistance and peripheral venous tone by about 30 percent.
- Stress Physiology