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When is CT scanning most sensitive for SAH?,”Non-contrast CT most sensitive within 6 hours of symptoms if read by qualified radiologist (100% sensitivity). Goes down after 6 hours, rapidly after 12-24 hours, so 6+ hours
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Read moreWhat are the 2 main risk factors for berry aneurysms?,”1. PCKD2. CT Dz (Marfan’s, Ehlers-Danlos
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Read moreWhere are berry aneurysms most common?,”Anterior communicating (30%), then posterior community
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Read moreWhat is the most important complication to avoid after a SAH? How do we prevent it?
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Read moreWhat are the 2 the most common non-traumatic cause of subarachnoid hemorrhage?
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Read moreHow do we differentiate subarachnoid hemorrhage from other headaches? What are common associated histories or exam findings?,”SUMSUDDEN onset – Thunderclap headache, “”Worse headache of my life””.UNLIKE other headaches.Maximal AT ONSET. Meningismus (nuchal rigidity, etc), focal neurological deficits (may be normal initially). Often occurs with exertion (exercise, intercourse, etc). Nausea
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Read moreWhat are deadly pathologies that can present with headache?,”THIS GEM CCCTemporal arteritisHypertensive encephalopathyICP increased – pseudotumour cerebri, tumourSubarachnoid hemorrhageGlaucoma (acute angle closure)Eclampsia (pre)Meningitis
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Read moreWhat are common histories of increased ICP headaches?,”1. Worse when supine, bending down, or in AM2. CN abnormalities (mainly 6), other neurological symptoms3. Subtle, gradual change in mood, cognition, behaviour
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Read moreWhat is the DDx for a ring-enhancing brain lesion on CT?
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