Summary: <p>In October of 2010 the prestigious British Medical Journal published the largest, and by far the best, study ever done on the diagnosis of SAH in the ED. The data are revolutionary, and they prompted us to take a new look at the classic teaching and modern approach to this diagnosis.</p> <p><br> It’s always fun to deep dive on a new topic, and we hoped to combine the newest data with the classic data to find a safe, rational, and smart approach to the evaluation of high risk headache. What we found was more earth shaking than we could have imagined. Come take a journey to the center of the data, new and old... this changes everything.</p>
