myoclonic seizures)
Seizures associated with fever due to illness or vaccinations
Seizures induced by prolonged exposure to warm temperatures
Seizures in response to strong lighting or certain visual patterns
Initially normal EEGs and later EEGs with slowing and severe generalized polyspikes
Normal initial development followed by slow development during the first few years of life
Some degree of hypotonia
Unstable gait and balance issues
Ankle pronation and flat feet and/or development of a crouched gait with age

Treatment
Seizures in Dravet syndrome can be difficult to manage but may be reduced by anticonvulsant medications such as clobazam, stiripentol, topiramate and valproate. Because the course of the disorder varies from individual to individual,  treatment protocols may vary. A diet high in fats and low in carbohydrates may also be beneficial, known as a ketogenic diet. Although diet adjustment can help, it does not eliminate the symptoms. Until a better form of treatment or cure is discovered, those with this disease will have myoclonic epilepsy for the rest of their lives.Certain anticonvulsant medications that are classed as sodium channel blockers are now known to make seizures worse in most Dravet patients. These medications include carbamazepine, gabapentin, lamotrigine, and phenytoin.Treatments include cognitive rehabilitation through psychomotor and speech therapy. In addition, valproate is often administered to prevent recurrence of febrile seizures and a benzodiazepine is used for long lasting seizures, but these treatments are usually insufficient.Stiripentol was the only medication for which a double-blind placebo-controlled randomized controlled trial was performed and this medication showed efficacy in trials.
The effects of this disorder do not diminish over time, and children diagnosed with Dravet syndrome require fully committed caretakers with tremendous patience and the ability to closely monitor them.Febrile seizures are divided into two categories known as simple and complex. A febrile seizure would be categorized as complex if it has occurred within 24 hours of another seizure or if it lasts longer than 15 minutes. A febrile seizure lasting less than 15 minutes would be considered simple. Sometimes modest hyperthermic stressors like physical exertion or a hot bath can provoke seizures in affected individuals. However, any seizure uninterrupted after 5 minutes, without a resumption of postictal (more normal; recovery-type; after-seizure) consciousness can lead to potentially fatal status epilepticus. Causes
In most cases the mutations in Dravet syndrome are not hereditary and the mutated gene is found for the first time in a single family member. In 70–90% of patients, Dravet syndrome is caused by nonsense mutations in the SCN1A gene resulting in a premature stop codon and thus a non-functional protein. This gene normally codes for neuronal voltage-gated sodium channel Nav1.1. In mouse models, these loss-of-function mutations have been observed to result in a decrease in sodium currents and impaired excitability of GABAergic interneurons of the hippocampus.