Anyone can experience vasovagal syncope, but it tends to be more common in children and young adults. Do you tend to faint when you have your blood drawn, or when you watch scary movies? Advertising revenue supports our not-for-profit mission.Check out these best-sellers and special offers on books and newsletters from Mayo Clinic. If you’ve never fainted before, and suddenly have a fainting episode, be sure to get medical attention. They also work to regulate your blood pressure by controlling the width of your blood vessels.Usually, these nerves work together to ensure that your brain is always getting enough oxygen-rich blood.But, sometimes, they can get their signals mixed up, especially when you have a reaction to something that causes your blood vessels to suddenly open wide and your blood pressure to drop.The combination of a drop in blood pressure and a slower heart rate can reduce the amount of blood flowing to your brain. Healthline Media does not provide medical advice, diagnosis, or treatment.
If you feel like you might faint, lie down and lift your legs.This allows gravity to keep blood flowing to your brain. It may also be called neurocardiogenic syncope.The vasovagal syncope trigger causes your heart rate and blood pressure to drop suddenly. It could help you avoid fainting, or at least prevent injury due to a fall.Vasovagal syncope is the most common cause of fainting. When that happens, the heart and autonomic nervous system (ANS) work to keep your blood pressure stable. But it's possible you … When fainting is caused by certain triggers, like the sight of blood or a needle, or an intense emotion like Vasovagal syncope is sometimes referred to as a neurocardiogenic or reflex syncope.

If your doctor thinks your medications may be causing you to faint, they’ll work with you to figure out how to safely taper you off of them without causing other side effects. Vasovagal syncope is the most common type in young adults [ 7] but can occur at any age. This exam will likely include several That may be all it takes to diagnose vasovagal syncope, but your doctor may want to rule out some other possible causes. Your doctor may recommend tests to rule out more serious causes of fainting, such as heart disorders.Before you faint due to vasovagal syncope, you may experience some of the following:During a vasovagal syncope episode, bystanders may notice:Recovery after a vasovagal episode generally begins in less than a minute.
All rights reserved. "Mayo," "Mayo Clinic," "MayoClinic.org," "Mayo Clinic Healthy Living," and the triple-shield Mayo Clinic logo are trademarks of Mayo Foundation for Medical Education and Research. All rights reserved. Combined, the drop in blood pressure and slowed heart rate quickly reduce blood flow to your brain, and you faint.Sometimes there is no classical vasovagal syncope trigger, but common triggers include:You may not always be able to avoid a vasovagal syncope episode. This may prevent you from fainting.If you do pass out, you’ll likely regain consciousness within a few moments, but you might feel:You may even feel a little confused or just plain “out of it” for a few minutes. If you can't lie down, sit down and put your head between your knees until you feel better.Mayo Clinic does not endorse companies or products. Although some causes of fainting can be a sign of a more serious health problem, that’s typically not the case with vasovagal syncope. Vasovagal syncope is caused by a sudden drop in blood pressure, often triggered by a reaction to something. The most important step is to try and determine your triggers. However, if you stand up too soon after fainting — within about 15 to 30 minutes — you're at risk of fainting again.Fainting can be a sign of a more serious condition, such as a heart or brain disorder. Doctors sometimes refer to vasovagal syncope (VVS) as neurocardiogenic syncope or reflex syncope. This is what causes you to pass out. A single copy of these materials may be reprinted for noncommercial personal use only.


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