In a group of 423 patients with cerebrovascular accident (CVA) the so-called risk factors have been studied and correlated with course and outcome of the disease. High levels of glycemia, seric lipids and uric acids, high blood pressure and cardiopathy are the most often observed abnormalities, but age is anyhow strictly correlated with the frequency of the disease and in old patients with diabetes bad outcome of the cerebrovascular accident is to be expected. The EEG, often a valid tool to evaluate the gravity of the cerebral lesion, can give clear information about the prognosis: bioelectrical signs of diffuse suffering of the brain are supporting a bad prognosis. The nature (ischaemic and haemorrhagic) of the CVA remains the most important factor influencing the course of the disease and death is very predictable in haemorrhagic accidents of diabetic patients.