The occurrence of subarachnoid hemorrhage (SAH) in patients with acute headache is strongly associated with the presence of several clinical variables. Nevertheless, the absence of such variables should not discourage physicians from investigating for SAH in individuals with headache peaking in intensity within a few minutes of onset.
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Maniyar, F., Goadsby, P. Clinical high-risk factors for subarachnoid hemorrhage. Nat Rev Neurol 7, 134–135 (2011). https://doi.org/10.1038/nrneurol.2011.16
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DOI: https://doi.org/10.1038/nrneurol.2011.16
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