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This Concept Map, created with IHMC CmapTools, has information related to: cluster headache, cluster diagnosis Usually dx by thorogh history. No diagnostic test. My use CT, MRI or MRA to rule out, cluster treatment (drug therapy not as useful) Rescue: O2, Sumatriptan, Rescue: O2, Sumatriptan prophylactic: Verapamil, lithium, ergoatmine, divalproex, NSAIDS, cluster definition rare HA characterized by repeated ha that occur weeks or months, followed by periods of remission. One of most severe types of head pain, cluster risk factors Cause nor patho is known, Extracranial vasodilation, trigeminal nerve is implicated. genetic component., cluster symptoms Sharp stabbing pain, Intense, lasting one hour, Pain located around eye, temple, forehead, cheek, nose, or gums, Swelling around eye, tearing (lacrimation) facial flushing, rhinitis, pupil constriction