How do I know if I have Dravet Syndrome?

Dravet syndrome is a rare, severe form of childhood-onset epilepsy that typically presents in the first year of life with prolonged, fever-related seizures in an otherwise healthy infant. Diagnosis is confirmed through specialized genetic testing, as approximately 80% of cases are caused by a mutation in the SCN1A gene.

What are the early signs and symptoms of Dravet syndrome?

In most infants with Dravet syndrome, the first seizure occurs before the age of one, often triggered by a fever or vaccination. These initial seizures are frequently hemiclonic (affecting one side of the body) or generalized tonic-clonic and are often unusually long, sometimes lasting more than 15 minutes. As the child develops, other types of seizures may emerge, including myoclonic jerks (sudden muscle twitches) and absence seizures. Parents may also notice developmental delays, sleep disturbances, and challenges with mobility or balance as the child progresses through early childhood.

How is Dravet syndrome diagnosed and what tests should I ask for?

Because the clinical presentation of Dravet syndrome can overlap with other epilepsy syndromes, a clinical diagnosis is often suspected based on seizure history and developmental trajectory. To confirm the diagnosis, your physician should order a comprehensive epilepsy genetic panel. Specifically, you should ask about:

• SCN1A gene sequencing: This is the gold standard, as a pathogenic variant in this gene is found in roughly 80% of Dravet syndrome patients.


• EEG (Electroencephalogram): While initial EEGs may appear normal, they often show specific patterns of generalized spike-wave discharges as the child ages.


• MRI: Imaging is typically performed to rule out structural causes of seizures, though in Dravet syndrome, the MRI is usually normal.

When should I seek urgent medical evaluation?

Any seizure that lasts longer than five minutes or happens in a cluster—where the child does not fully recover consciousness between events—is a medical emergency. If a child with suspected Dravet syndrome experiences a prolonged seizure, call emergency services immediately. It is vital to document the duration, nature, and triggers of every seizure to provide your neurologist with an accurate clinical picture.

How do I advocate for my child if my concerns are dismissed?

If you suspect Dravet syndrome but feel your concerns are not being addressed, it is essential to seek a second opinion from a pediatric epileptologist, ideally at a comprehensive epilepsy center. You are the expert on your child’s daily life. Keep a detailed seizure diary, including video recordings of events, which can be invaluable diagnostic tools. Connecting with the 453 members of the DiseaseMaps.org community who have navigated this journey can provide both emotional support and practical guidance on finding specialist care.

What is the difference between normal variation and Dravet syndrome?

Isolated febrile seizures are common in young children and are usually benign. However, Dravet syndrome is distinguished by the frequency, duration, and complexity of the seizures, alongside the presence of developmental stagnation or regression. Unlike simple febrile seizures, the seizures associated with Dravet syndrome often become more frequent and resistant to standard anti-seizure medications over time.

Next steps

• Consult a pediatric epileptologist to discuss genetic testing for SCN1A variants.


• Maintain a detailed log of seizure activity, including duration and potential triggers like temperature or stress.


• Join the DiseaseMaps.org community to connect with other families living with Dravet syndrome.


• Review resources from the Dravet Syndrome Foundation to better understand current treatment guidelines and research.

Medical disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of a qualified healthcare provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Dravet Syndrome Overview.


• Orphanet: Rare Disease Database (ORPHA: 33076).


• Online Mendelian Inheritance in Man (OMIM): Dravet syndrome (#607208).


• Dravet Syndrome Foundation: Clinical diagnostic criteria and patient resources.