title: Incidence of delayed cerebral ischaemia following subarachnoid haemorrhage of unknown cause.
abstract: A retrospective study was made of 50 consecutive patients with spontaneous subarachnoid haemorrhage for which no cause was found, looking for evidence of delayed cerebral ischaemia particularly during the first 2 weeks after the bleed. Twenty-three patients had blood visible on the CT scan but only 4-6% developed delayed ischaemia, all of whom made a good recovery. The low incidence of this complication in this group of patients suggests that subarachnoid blood is not a sufficient cause for delayed ischaemia.
mesh_terms: D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging; D002545:Brain Ischemia / Q000000981:diagnostic imaging / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000150:complications*; D013997:Time Factors; D014057:Tomography, X-Ray Computed