Acute headache is a common emergency department presentation that accounts for 1-2% of all encounters (Goldstein 2006) The differential includes many life-threatening diagnoses, one of which is aneurysmal subarachnoid hemorrhage (SAH). With an estimated overall prevalence of 2% and a 1-month mortality of 40-45%, SAH is a high-risk disease that no emergency physician wants to miss (Linn 1996).
Read More