- While most fainting is benign, exertional syncope needs medical evaluation.
- Collapse during vigorous activity signals potential serious underlying cardiac conditions.
- Prompt medical assessment requires detailed history, ECG, and further tests.
Children run, jump and play for hours so when a child complains of dizziness or suddenly feels faint, parents may think it’s due to exhaustion, dehydration, heat or not eating enough. Most fainting episodes in children are not caused by a serious disease. But a child who suddenly collapses or loses consciousness during running, sports or vigorous physical activity needs medical evaluation.
Fainting, medically referred to as syncope, is the result of a brief decrease of blood flow to the brain. Vasovagal syncope is the most common type in children and adolescents and is generally benign. However, exertional syncope is an important warning sign of cardiac disease, as it may be associated with an underlying structural or electrical abnormality of the heart in rare cases.
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What’s Different About Fainting During Exercise?
Timing of the episode is important. In some cases, a fairly benign cause is the child feeling lightheaded after standing up suddenly, prolonged exposure to heat, dehydration or skipping a meal. 2. But when it occurs in the middle of running, playing football, cycling or other strenuous activity, it merits more attention.
Cardiac causes of syncope in children are rare but include hypertrophic cardiomyopathy, congenital coronary artery abnormalities, Long QT Syndrome and catecholaminergic polymorphic ventricular tachycardia (CPVT). Some of these conditions can make it difficult for the heart to maintain a normal rhythm when you are physically stressed. A child with an inherited rhythm disorder is otherwise often perfectly healthy.
Warning Signs Parents Should Look For?
If the child collapses during exercise, particularly when accompanied by chest pain, unusual shortness of breath, palpitations or a sudden fall in exercise tolerance, parents should seek medical advice.
Family history is important as well. If there is a history of sudden unexplained death at a young age, inherited heart disease, unexplained fainting or serious rhythm disorders among close relatives, this should always be reported to the doctor.
The common type of faint, known as vasovagal, usually provides children with warning signs such as nausea, sweating, blurry vision, dizziness or an impending feeling of passing out. In some cases, a sudden collapse during exertion with little or no warning can be more concerning.
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Does Fainting Always Mean Heart Disease?
Nope. Most fainting episodes in otherwise healthy children are not caused by heart disease. Common triggers include dehydration, prolonged standing, emotional stress, heat exposure and insufficient food intake. The important thing is not to self-diagnose the cause, particularly if the episode occurs during strenuous activity or continues to recur.
What Tests Might Be Required?
The evaluation typically begins with a detailed account of what happened before, during and after the episode, as well as the child’s medical and family history and a physical examination.
Your initial evaluation may include an electrocardiogram (ECG). Based on the results and degree of suspicion, doctors may request additional tests such as an echocardiogram, ambulatory rhythm monitoring such as a Holter monitor or an exercise stress test.
The bottom line for parents is this: If a child collapses while actively running or playing, don’t automatically assume it’s weakness or exhaustion. The underlying trigger may be benign but exertional syncope is a warning sign that warrants timely assessment by a paediatrician or paediatric cardiologist.
Disclaimer: The information provided in the article is shared by experts and is intended for general informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition.
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