Sign or Symptom
vasovagal reaction
va·so·va·gal re·ac·tion
Definitions related to vasovagal reaction:
  • Sudden drop of the blood pressure, bradycardia, and peripheral vasodilation that may lead to loss of consciousness. It results from an increase in the activity of the vagus nerve. It may be triggered by emotions of fear or pain or gastrointestinal upset and may be relieved by lying down while keeping the legs elevated.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
  • Sudden onset of decreased blood pressure, bradycardia, and peripheral vasodilation resulting from increased activity of the vagus nerve.
    NICHD Pediatric Terminology
    U.S. National Cancer Institute, 2021
  • A disorder characterized by a sudden drop of the blood pressure, bradycardia, and peripheral vasodilation that may lead to loss of consciousness. It results from an increase in the stimulation of the vagus nerve.
    Common Terminology Criteria for Adverse Events
    U.S. National Institutes of Health, 2021
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