[The value of EEG in subarachnoidal haemorrhagia]

The EEG findings from patients with subarachnoidal haemorrhage are described. The results of the EEG and CT are compared. Furthermore the influence of neurological deficits on the number and degree of pathological EEG results was investigated and the EEG of patients with and without intracranial aneurysm, shown by angiography, were correlated. The EEG was pathological in 47 patients (70%) predominantly with focal changes. In the 17 patients with intracranial lesions pathological EEG records were significantly commoner and the changes were more evident. Also in patients with neurological deficits pathological EEG were significantly more frequent. In 25 patients with aneurysm, proved by angiography, predominately focal changes were found which gave us information about the site of the aneurysm. It was shown, that the EEG gives informations about intracerebral lesions and that in cases with subarachnoidal haemorrhage functional disturbances can be seen. The EEG is also of prognostic value.