Failure of reflex venoconstriction during exercise in patients with vasovagal syncope

Helen L. Thomson, John J. Atherton, Frederick A. Khafagi, Michael P. Frenneaux

Research output: Contribution to journalArticlepeer-review

74 Citations (Scopus)


In this study, we tested two hypotheses. First, we tested the hypothesis that reflex constriction of the venous capacitance beds in patients with vasovagal syncope is impaired during both subhypotensive lower-body negative pressure. Second, we proposed that splenic venoconstriction may be impaired during exercise in patients with vasovagal syncope.
Original languageEnglish
Pages (from-to)953-959
Number of pages7
Issue number5
Publication statusPublished - 1 Mar 1996


  • Adult
  • Aged
  • Blood Pressure
  • Exercise
  • Female
  • Humans
  • Lower Body Negative Pressure
  • Male
  • Middle Aged
  • Reflex
  • Spleen
  • Syncope
  • Vascular Resistance
  • Vasoconstriction
  • Veins

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