Abstract
Summary
A new type of electrically recording bristle flowmeter is described, which permits measurement of volume flow of blood and its phasic changes. By recording superior vena cava flow, direct evidence is presented that the greatest acceleration of blood and a marked volume inflow into the right atrium occurs during ventricular systole, when the tricuspid valves are closed. This demonstrates the active influence of ventricular contractions on venous return.
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