Ischemic Stroke and Early Vertical Positioning (SEVEL)

Inclusion Criteria: * Age 18 years or older * Persistent neurological impairment at the participated time, related to an ischemic stroke defined by a sudden neurological deficit. The neurological deficit must not accompany hemorrhage on cerebral tomodensitometry which occurs on the same day or the day previous to the participation * Patient hospitalized in Neurology department on the day of the participation * Patient affiliated to the social security Exclusion Criteria: * Malignant cerebral infarction, loss of consciousness, comatose with GCS under 13, cerebral herniation, life- threatening infarction. * Minor neurological deficit defined by isolated facial palsy, dysarthria, hemianopia, sensitive impairment, or every clinical condition that let the physician thinks that the stay in the hospital would be less than 72 hours. * Known intracranial stenosis above 50% linked to the current infarction * History of orthostatic neurological degradation * Vomiting * Deep venous thrombosis or suspicion of. * Patients displaying a loss of autonomy with a Rankin score \>3 previous to stroke onset. * Patient's refusal * Patient under legal protection