Seventy-nine survivors of a ruptured anterior cerebral artery aneurysm were assessed at intervals ranging from six months to 8½ years after the haemorrhage. Fifty-two patients were neurologically unimpaired at follow-up, and 44 had returned to their previous work level. Sixty-six patients were treated by proximal occlusion of the anterior cerebral artery mainly responsible for feeding the aneurysm; this operation appeared to reduce the long-term mortality.
A principal components analysis extracted four independent components corresponding to intellectual impairment, elation/depression, affective release/flattening, and language impairment. In nine instances both patient and informant agreed that there had been a personality change for the better, of the type seen after a favourable leucotomy, although a price was usually paid for this in the form of a mild memory impairment.