Viscosity in Relation to Cardiac Output, Blood Pressure and Peripheral Resistance
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According to the ideas of Guyton (Cowley 1978) the cardiac output is determined by a number of factors which can be classified as either peripheral or central. Peripheral factors are those which determine the venous return (VR). The main force producing venous return is the mean circulatory filling pressure (Psf) minus the right atrial pressure (Pra). The resistance to venous return is determined by the vascular tone, viscosity, and shunting. Central factor is the pumping action of the heart, including the possibility of both hyperactivity and hypoactivity.
KeywordsCardiac Output Venous Return Blood Viscosity Peripheral Resistance Atrial Pressure
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