Definition of Dravet syndrome

Dravet syndrome (formerly called Severe Myoclonic Epilepsy of Infancy (SMEI): is a rare, genetic form of epilepsy that begins in infancy characterized by prolonged and frequent seizures. Infants may also have behavioral and developmental delays, problems with movement and balance, speech problems and delayed language development, and growth issues. Mutations in SCN1A gene are seen in about 80% of infants. Treatment options are limited.