Differentiates Reversible Cerebral Vasoconstriction Syndrome (RCVS) from other causes of thunderclap headache and intracranial arteriopathy, particularly CNS vasculitis. Higher scores favor RCVS diagnosis.

Parameters

Recurrent or Single Thunderclap Headache

No thunderclap headache+0Single thunderclap headache (+2 pts)+2Recurrent thunderclap headache (+5 pts)+5

Intracranial Carotid Artery Involvement

No carotid involvement+0Intracranial carotid involvement (+−1 pt)-1

Vasoconstrictive Trigger Present

No trigger identified+0Vasoconstrictive trigger present (+3 pts)+3

Sex

Male+0Female (+1 pt)+1

CSF White Cell Count

Not performed or < 10 cells/mm³+0CSF ≥ 10 cells/mm³ (−2 pts; suggests vasculitis)-2

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CalculatorsRCVS2 Score

NeurologyScore

RCVS2 Score