Plasma norepinephrine response to tilting in essential hypertension.


A significant increase in the plasma concentration of norepinephrine on tilting 19 normal st:bjects from the horizontal to 600 upright is described. Evidence that this represents an increased neuj-oadrenergic activity to maintain cerebral circulation despite the periph-e-pooling of blood has previously been reported. When 9 subjects with severe essen-LI il… (More)

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