New-Onset Status Epilepticus in Pediatric Patients: Causes, Characteristics, and Outcomes.

Background: Many pediatric patients presenting with status epilepticus have no history of seizures.

Methods: We retrospectively analyzed the clinical characteristics of patients aged one month to 21 years who presented during six consecutive years with convulsive status epilepticus and without a history of seizures. New-onset refractory status epilepticus was defined as status epilepticus refractory to two lines of treatment, without an identified cause in the first 48 hours.