The Contribution of Blood Momentum to Left Ventricular Ejection in the Dog

摘要: In five conscious dogs and two anesthetized dogs, the pressure gradient between left ventricle ascending aorta was measured with high fidelity micromanometers. Left ventricular exceeded aortic in first 30 to 50% of ejection period. Aortic during remainder The magnitude these differences varied from 5 20 mm Hg. This finding late systole implies that at this time blood is flowing out under its own momentum a source for ventricle. suddenly occluded verify hypothesis. When occlusion occurred last third period, there an abrupt fall pressure, apparently confirming