Effect of 60-minute head-down tilt on arterial baroreflex function in anesthetized dogs

Michael L. Smith, William G. Squires, Tedd A. Brandon, Peter B. Raven, Sarah A. Nunneley

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Arterial baroreflex control of heart rate was assessed in 6 anesthetized dogs with a bolus infusion of phenylephrine before and during cardiopulmonary receptor stimulation by 6° head-down tilt (HDT) for 60 min. No difference in arterial baroreflex function was observed between the control and HDT conditions. It appears that the attenuation of baroreflex function that occurs during acute stimulation of cardiopulmonary baroreceptors disappears when cardiopulmonary baroreceptors reset after prolonged stimulation.

Original languageEnglish
Pages (from-to)87-90
Number of pages4
JournalJournal of the Autonomic Nervous System
Issue number1
StatePublished - Jul 1987



  • Arterial baroreceptor
  • Blood pressure
  • Cardiopulmonary baroreceptor
  • Dog
  • Phenylephrine
  • Resetting

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