Carotid sinus baroreceptor control of splanchnic resistance and capacity

M. J. Brunner, A. S. Greene, A. E. Frankle, A. A. Shoukas

Research output: Contribution to journalArticlepeer-review

Abstract

The contribution of the splanchnic vascular bed in the carotid sinus baroreceptor reflex control of vascular resistance and capacity was studied in nine pentobarbital-anesthetized dogs. The splanchnic circulation was vascularly isolated in an unopened abdomen and perfused at constant flow and venous pressure. Decreasing carotid sinus pressure from 200 to 50 mmHg resulted in a 72% increase in splanchnic vascular resistance and a decrease in splanchnic blood volume of 4.7 ml/kg. Changes in splanchnic inflow from 0 to 70 ml · min-1 · kg-1 resulted in linear changes in splanchnic arterial pressure. Increasing carotid sinus pressure significantly decreased the slope (P < 0.005) and intercept (P < 0.025) of the splanchnic pressure-flow relationship. It is concluded that in the dog, the splanchnic vascular bed contributes a major portion of blood volume mobilized by the carotid sinus reflex.

Original languageEnglish (US)
Pages (from-to)24/6
JournalAmerican Journal of Physiology - Heart and Circulatory Physiology
Volume255
Issue number6
StatePublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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