HEMODYNAMICS OF AORTIC OCCLUSION

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Abstract
Aortic occlusion raises the arterial pressure and increases the heart output. The rise in arterial pressure only occurs when blood is transported from the occluded area into the cephalic part of the circulation. Hampering this transport, for instance,by simultaneous clamping of the vena cava inferior greatly reduces the blood pressure rise due to aortic occlusion. A mathematical model of the blood circulation is proposed which satisfactorily accounts for the observed changes in blood pressure and heart output caused by aortic occlusion.

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