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The average annual incidence of subarachnoid hemorrhage (SAH) from aneurysm rupture in Rochester, Minnesota, has remained remarkably constant at about 11 per 100,000 population. Age-specific incidence increased with age. Survival after SAH depended on: (1) clinical grade, (2) time after onset of SAH, and (3) presence of intracerebral hematoma. Among those who survived to receive medical attention, 48% were clinical grade 1 or 2, 20% were grade 3, and 32% were grade 4 or 5. Proved rebleeding occurred within 10 days of the first SAH in 20% of patients who survived until hospital admission.

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Published In

Volume 30Number 10October 1980
Pages: 1034
PubMed: 7191493

Publication History

Published online: October 1, 1980
Published in print: October 1980


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Affiliations & Disclosures

Lawrence H. Phillips, II, M. D.
Mayo Clinic and Mayo Foundation, Rochester, MN.
Jack P. Whisnant, M. D.
Mayo Clinic and Mayo Foundation, Rochester, MN.
W. Michael O'Fallon, Ph.D.
Mayo Clinic and Mayo Foundation, Rochester, MN.
Thoralf M. Sundt, Jr., M. D.
Mayo Clinic and Mayo Foundation, Rochester, MN.

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