Osmoregulation and baroregulation of plasma vasopressin in essential hypertension.

Abstract:

:Vasopressin secretion is stimulated by hyperosmolality, hypovolemia, or hypotension and is inhibited by hypoosmolality, hypervolemia, or hypertension. These osmotic and hemodynamic influences are mediated by neuronal afferents that originate in separate osmoreceptors or baroreceptors but ultimately converge to act on the same neurosecretory neurons. Functionally, the two control systems are integrated in such a way that osmoregulation is altered but not disrupted by hemodynamic influences. In patients with uncomplicated essential hypertension, basal as well as osmotically stimulated vasopressin is completely normal. The vasopressin response to an acute reduction in blood pressure is also normal if the values are expressed relative to the change in pressure. However, if the plasma vasopressin response is plotted as a function of absolute blood pressure, the line describing the relationship lies well to the right of normal. Thus, although it is completely intact, the baroregulatory mechanism appears to be reset to a higher level in essential hypertension. These results suggest that increased secretion of vasopressin does not contribute to the genesis or maintenance of uncomplicated, untreated essential hypertension but may antagonize the therapeutic effect of some antihypertensive drugs. If so, antagonists of V1 receptors may be useful as second-line adjunctive therapy for this condition.

journal_name

J Cardiovasc Pharmacol

authors

Robertson GL,Ganguly A

doi

10.1097/00005344-198600087-00017

subject

Has Abstract

pub_date

1986-01-01 00:00:00

pages

S87-91

eissn

0160-2446

issn

1533-4023

journal_volume

8 Suppl 7

pub_type

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