[Risk of hemorrhage and size of hematoma in patients with cerebral arteriovenous malformations].

The occurrence of intracranial haemorrhage, epileptic seizures and focal neurological signs was estimated in the group of 40 patients with AVMs. Size of AVM, its localization was established by angiography. Maximum diameter of a haematoma was measured on preoperative CT. We found that small AVMs (diameter < 3 cm) are more often the source of intracranial haemorrhage than larger ones. Intracerebral haematoma was the larger the lesser was AVM. Intracerebral haematoma has no influence on immediate and long-term results of operative treatment of AVMs.