Vasovagal Reflex Quiz

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Scott Nass, MD, MPA, FAAFP, AAHIVS (GP / Family doctor)

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Learn more about Vasovagal reflex

Content updated on Sep 20, 2022

What is vasovagal reflex?

Vasovagal reflex is a sudden drop in heart rate and blood pressure leading to fainting. It could be triggered by stress, long periods of standing, heat exposure or the sight of blood or anything unpleasant.

Symptoms of vasovagal reflex

  • Losing consciousness

  • Losing consciousness during or after meals

  • Losing consciousness after moving my neck

  • Dizziness

Questions your doctor may ask to check for vasovagal reflex

Your doctor may ask these questions to diagnose vasovagal reflex

  • Have you currently regained consciousness after temporarily losing consciousness?

  • Did you faint (lose consciousness) during or after a meal?

  • Did you faint (lose consciousness) when you turned around or moved your neck?

  • Are you feeling dizzy right now?

Treatment for vasovagal reflex

A doctor will first usually try to rule out more serious causes of fainting. Vasovagal reflex/ syncope usually requires no further treatment. Avoiding triggers and adequate hydration can help. In rare cases, pacemaker may be required.

View the symptoms of Vasovagal reflex

  • Faint

  • Dizziness


  • Cai W, Kang H, Hai T. Vasovagal reflex emergency caused by Riedel's thyroiditis: A case report and review of the literature. Asian J Surg. 2016 Jan;39(1):41-4. doi: 10.1016/j.asjsur.2013.01.008. Epub 2013 May 3. PMID: 23644007.

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National Center for Child Health and Development, Japan

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