4. Non convulsive status epilepticus
1-7% of patients with SAH will have seizure activity at the time of the initial bleed. Non convulsive status epilepticus can lead to a reduced level of consciousness. This diagnosis can be confirmed or excluded by performing an EEG. At present there is no proven benefit for prophylactic use of anticonvulsants in this patient group, but in those with confirmed seizures, anticonvulsant medication should be given.