Reversible Cerebral Vasoconstriction Syndrome Triggered by Typhoon Hagibis in 2019: Report of 2 Cases

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Although reversible cerebral vasoconstriction syndrome (RCVS) is a relatively rare condition, we encountered 2 consecutive patients with RCVS during Typhoon Hagibis in 2019. The first patient developed headache when the atmospheric pressure rapidly fell, and the second patient developed headache when the atmospheric pressure rapidly rose. Extreme atmospheric pressure fluctuations might induce neuronal activity in the trigeminal nucleus caudalis and sympathetic activation. Our experience with these 2 patients indicates the importance of magnetic resonance angiography for individuals with thunderclap headache during a typhoon.

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