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For further information, see CMDT Part 24-09: Stroke
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Essentials of Diagnosis
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Sudden ("thunderclap") severe headache
Signs of meningeal irritation usually present
Obtundation is common
Focal deficits frequently absent
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General Considerations
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5–10% of strokes are due to subarachnoid hemorrhage
Trauma is the most common cause
Frequently results from the rupture of an arterial saccular ("berry") aneurysm or from an arteriovenous malformation
Factors associated with a higher risk of subarachnoid hemorrhage
See also Aneurysm, Intracranial
See Table 24–3
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