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I have an intracerebral aneurysm. What is the risk of death from rupture?

April 26, 2017aneurysm death intracerebral risk rupture

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I have an intracerebral aneurysm. What is the risk of death from rupture?

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If rupture occurs, only approximately half of the patients survive. The best predictor of risk of rupture is the size of the aneurysm. Most aneurysms that rupture have a diameter equal to or greater than 10mm (about half an inch) but rupture also occurs with aneurysms of smaller size. A guide to prognosis is provided by the neurologic grade (Hunt and Hess Grades I-V) of the patient determined by his/her level of consciousness and neurologic deficits when first examined upon arrival to the hospital. In a large study of survival of patients from aneurysm rupture, a Grade of I-II (awake with slight to moderately severe headache and neck stiffness) predicted a low mortality (4%) and an independent life (up to 90%) at follow-up whereas Grades IV-V (stupor with neurological deficits to deep coma) predicted increasingly higher mortality rates (up to 46%) and decreased independent functioning (only about 30%).