Alpha-adrenoceptors, adrenaline, and exaggerated vasoconstrictor response to stress in essential hypertension.
Chest
; 83(2 Suppl): 304-6, 1983 Feb.
Article
em En
| MEDLINE
| ID: mdl-6295706
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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Base de dados:
MEDLINE
Assunto principal:
Vasoconstrição
/
Epinefrina
/
Receptores Adrenérgicos
/
Receptores Adrenérgicos alfa
/
Hipertensão
Tipo de estudo:
Diagnostic_studies
Limite:
Adult
/
Humans
/
Middle aged
Idioma:
En
Ano de publicação:
1983
Tipo de documento:
Article