XXXX in middle-Finland: incidence, early prognosis and indications for neurosurgical treatment.

@entity1 @entity439 @entity548 @entity510
The incidence of @entity510 ( @entity510 ) in Middle-Finland 1976-78 was 19.4/100,000/year. The incidence increased consistently with age. The early prognosis was similar to that in earlier studies, with 25% dying on the first day, and 49% during the first 3 months after the initial @entity548 . The fatality rate decreased sharply after the @entity548 : of all deaths during the first 3 months, the weekly fatality rate was 65% during the 1st week, 12% during the 2nd, and 4% during the 3rd. Thereafter the weekly fatalities up to 3 months averaged 1.6%. Only 20% of the @entity1 of the entire series were assessed as being eligible for neurosurgical treatment. Intercurrent fatal rebleeds further reduced this number. The chances of increasing the number of @entity510 @entity1 suitable for neurosurgery are discussed. The timing of surgery should be earlier than in the present study (median 15 days after the @entity548 ) in order to avoid frequently fatal recurrences. Vertebral angiograms should be obtained from @entity1 with no @entity439 found by bilateral carotid angiography. The upper age limit of 60 years should be abolished. By these means the proportion of @entity510 @entity1 potentially eligible for neurosurgery could be increased to about 40%.
