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MediumNeurologySubarachnoid Haemorrhageukmlamrcem sbamrcp part 1pane

A 23-year-old woman presents to the Emergency Department with a severe headache, which she describes as the 'worst headache of her life'. It came on suddenly, reaching maximum intensity within a minute. She has vomited and has some neck stiffness. Her GCS is 15/15. What is the most important initial investigation?

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