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ModerateNeurologySubarachnoid Hemorrhageus-abemus-usmle-step-2us-usmle-step-3

A 59-year-old woman presents with sudden-onset severe headache described as the worst of her life. Blood pressure is 160/92 mm Hg. Neurologic exam is normal. Noncontrast CT head is negative for hemorrhage. What is the most appropriate next diagnostic step?

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