Reflex cutaneous vasoconstriction during cold pressor test is mediated through α-adrenoceptors

Research output: Contribution to journalArticle

Abstract

The effects of the cold pressor test on the coronary circulation have been clearly defined but the effects on the peripheral vasculature are less well understood. To measure the peripheral vasomotor response during cold pressor test perfusion in the upper extremity contralateral to the cold immersion was assessed by laser Doppler flowmetry and skin-surface temperature gradients. To identify the mechanism of vasoconstriction, cold pressor test was performed before and after the administration of phentolamine, an α-adrenoceptor antagonist. Vasoconstriction during cold pressor test was demonstrated by both skin-surface temperature gradients and by laser Doppler flowmetry. This vasoconstrictor response was significantly attenuated by the administration of phentolamine. The results demonstrate that the cold pressor test induces an α-adrenoceptor mediated vasoconstriction in the peripheral vasculature.

Original languageEnglish (US)
Pages (from-to)257-261
Number of pages5
JournalClinical Autonomic Research
Volume4
Issue number5
DOIs
StatePublished - Oct 1 1994

Keywords

  • Cold pressor test
  • Nervous system
  • Phentolamine
  • Vasoconstriction
  • α-adrenoceptor antagonist

ASJC Scopus subject areas

  • Endocrine and Autonomic Systems
  • Clinical Neurology

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