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Alpha-adrenoceptors, adrenaline, and exaggerated vasoconstrictor response to stress in essential hypertension.

Authors
  • Bühler, F R
  • Bolli, P
  • Hulthén, U L
  • Amann, F W
  • Kiowski, W
Type
Published Article
Journal
Chest
Publication Date
Feb 01, 1983
Volume
83
Issue
2 Suppl
Pages
304–306
Identifiers
PMID: 6295706
Source
Medline
License
Unknown

Abstract

Stressful sympathetic stimulation by cold pressor test in patients with essential hypertension results in an exaggerated response of the already elevated plasma adrenaline, heart rate, blood pressure, and alpha-adrenoceptor-mediated vasoconstriction when compared with normotensive subjects. The stress-induced increase in adrenaline was correlated with the attendant increase in blood pressure. The stress-induced reduction in forearm flow was reversed during infusion of the postjunctional alpha 1-adrenoceptor blocker prazosin. Therefore, enhanced responses to sympathetic stress, as reflected and perhaps caused by an exaggerated rise in plasma adrenaline, may contribute to an increased alpha 1-adrenoceptor-mediated vasoconstriction in essential hypertension.

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