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Vasovagal Syncope

Vasovagal syncope, also known as neurocardiogenic syncope, is fainting caused by a sudden, temporary drop in blood flow to the brain. Vasovagal syncope is the most common type of syncope. It is usually caused by an intense emotional trigger like fear that reduces blood pressure and slows the heart.

Signs & Symptoms

Before faint due to vasovagal syncope, a patient may experience:

  • Pale skin
  • Lightheadedness
  • Tunnel vision
  • Nausea
  • Feeling warm
  • A cold, clammy sweat
  • Yawning
  • Blurred vision


A Deborah Specialty Physician may order one or more tests to determine the cause of syncope. These tests check things like the condition of the heart, heart rate, blood volume, and blood flow in different positions.