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Headache caused by reversible cerebral vasoconstriction syndrome (RCVS) and persisting for more than 3 months after onset.
- Headache previously diagnosed as 220.127.116.11 Acute headache attributed to reversible cerebral vasoconstriction syndrome (RCVS) and fulfilling criterion C
- Normalization of cerebral arteries, shown by follow-up indirect or direct angiography, within 3 months of onset of RCVS
- Headache has persisted for >3 months after its onset
- Not better accounted for by another ICHD-3 diagnosis.
A few studies have documented headaches meeting the criteria for 18.104.22.168 Persistent headache attributed to past reversible cerebral vasoconstriction syndrome. Research is needed to identify risk factors for such persistent headache; a previous history of 1. Migraine may play a role, as may anxiety/depression.