• Headache is a chief complaint that accounts for 2% of emergency department (ED) visits.
  • SAH 1% of headache (2%).
  • Commonly due to ruptured aneurysm.
  • symptoms: Rapid onset of headache, worst of life headache, exertional headache, syncope with headache, vomiting, and neck stiffness are red flags associated with a higher pretest probability of SAH.
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