Syncope (Fainting) in Children
Syncope — a temporary loss of consciousness — is common in children and adolescents and is most often benign. Certain patterns, however, require a closer look to rule out cardiac causes.
What Is Syncope?
Syncope is a sudden, brief loss of consciousness caused by a temporary reduction in blood flow to the brain. It usually lasts seconds and resolves on its own. In most cases, the child wakes up feeling confused or tired but otherwise well.
Common Causes
Vasovagal syncope (neurocardiogenic) is by far the most common cause — triggered by standing too long, heat, pain, or emotional stress. Other causes include dehydration, orthostatic hypotension, and — rarely — cardiac arrhythmias or structural heart disease.
When Should Syncope Be Evaluated?
Any child who faints during exercise, without warning, or repeatedly should be evaluated by a cardiologist. A family history of sudden cardiac death at a young age, or fainting accompanied by chest pain or palpitations, also warrants urgent assessment.
What to Expect at Your Visit
We review the full episode history — what the child was doing, whether there were warning signs, and how they recovered. Testing typically includes an EKG. Additional testing (echocardiogram, tilt-table test, Holter monitor) is ordered based on findings.
Is Syncope Dangerous?
The vast majority of syncope in children is vasovagal (benign) and requires reassurance and lifestyle adjustments rather than medications or procedures. A small subset of cases reflect cardiac arrhythmias that benefit from targeted treatment.
When to Seek Urgent Care
Seek immediate medical attention if your child experiences:
- Fainting during or immediately after exercise
- Fainting without any warning signs (no dizziness or nausea beforehand)
- More than one fainting episode within a short time period
- Fainting with chest pain or palpitations
- Family history of sudden unexplained death at a young age
- Injury from a fall during a fainting episode
Our Approach
- Obtain a detailed account of the episode and any preceding symptoms
- Review personal and family cardiac history
- Perform a focused cardiovascular examination
- Obtain a baseline EKG and assess for long QT, WPW, or other findings
- Order echocardiogram or ambulatory monitoring when clinically indicated
- Counsel on activity, hydration, and prevention strategies
Frequently Asked Questions
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