cliot (version 1.0.0)

rcvs2_score: RCVS2 Score for Reversible Cerebral Vasoconstriction Syndrome

Description

Calculates the RCVS2 score to distinguish Reversible Cerebral Vasoconstriction Syndrome (RCVS) from other intracranial arteriopathies (e.g., Primary Angiitis of the CNS) in adult patients (18-55 years) presenting with abnormal intracranial vascular imaging.

Usage

rcvs2_score(recurrent_thunderclap_headache, carotid_artery_involvement,
            vasoconstrictive_trigger, sex, subarachnoid_hemorrhage)

Value

A list containing:

RCVS2_Score

The calculated total score (Range -2 to 10).

Risk_Category

Classification of likelihood (Low <=2, Equivocal 3-4, High >=5).

Interpretation

Diagnostic guidance based on the score.

Arguments

recurrent_thunderclap_headache

Numeric (0 or 1). Presence of recurrent or single thunderclap headache. (1 = Yes, +5 points).

carotid_artery_involvement

Numeric (0 or 1). Is the intracranial carotid artery affected? (1 = Yes, -2 points).

vasoconstrictive_trigger

Numeric (0 or 1). Was a vasoconstrictive trigger identified (e.g., vasoactive medications, postpartum state, illicit drugs)? (1 = Yes, +3 points).

sex

String. Patient sex ("Male" or "Female"). (Female = +1 point, Male = 0 points).

subarachnoid_hemorrhage

Numeric (0 or 1). Is subarachnoid hemorrhage present on imaging? (1 = Yes, +1 point).

References

Rocha EA, Topcuoglu MA, Silva GS, Singhal AB. RCVS2 score and diagnostic approach for reversible cerebral vasoconstriction syndrome. Neurology. 2019;92(7):e639-e647. doi:10.1212/WNL.0000000000006917

Examples

# Example 1: High Likelihood
# Recurrent TCH (+5), Female (+1), Trigger (+3), No Carotid (0), No SAH (0)
# Score = 9
rcvs2_score(1, 0, 1, "female", 0)

# Example 2: Low Likelihood
# No TCH (0), Carotid involved (-2), No Trigger (0), Male (0), No SAH (0)
# Score = -2
rcvs2_score(0, 1, 0, "male", 0)