Biomarkers In Seizure To Predict Recurrence and Severe Outcomes

Prospective study for a 12 month period in Paris (France) and London (UK). Inclusion criteria : * seizure within 24h of attendance to an Emergency department (ED) * or seizure in the ED Exclusion Criterie : * pregnancy * prisoneer Primary endpoint : \- recurrence of seizure, hospitalisation more than 24 hours or death within seven days Secondary endpoint : * Hospital free days at day 7 and day 28 * Death, ICU admission, or neurosurgical intervention at day 7 and day 28 * Return visit to the ED or re admission at day 7 and day 28 data collection: * demographics * past medical history, medication * vital signs (Heart rate, temperature, Pulse oxymetry, blood pressure, GCS) on arrival * Pathology (White cell count, Sodium, Calcium, Glucose, lactate) * Protein S100B and Copeptin * Seizure characteristics (Witnessed, simple, partial, complex, provoked, acute symptomatic, idiopathic) * Discharge plan, outcomes Follow up at day 7 and day 28, hospital visit or phone call