Subarachnoid Hemorrhage: A Sharp Needle in a Haystack

Abstract

This systematic review by Carpenter and colleagues assesses clinical findings and investigations for emergency department (ED) patients with acute headache.¹ Half of all subarachnoid hemorrhage (SAH) patients, those with global or focal neurological deficits, are immediately apparent. It is the patient with a new rapidly peaking headache and no other neurological findings who is difficult to identify, and likely to be helped by early management.

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