CHA₂DS₂-VASc

Atrial fibrillation — stroke risk
Congestive heart failure
Hypertension
Diabetes
Previous stroke, TIA, or clot
Vascular disease
Age
Sex
Enter the patient's age to calculate
Evidence
Original publication
Lip GYH, Nieuwlaat R, Pisters R, Lane DA, Crijns HJGM. Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor-based approach.
Chest, 2010
Open source
Validation
Olesen JB, Lip GYH, Hansen ML, et al. Validation of risk stratification schemes for predicting stroke and thromboembolism in patients with atrial fibrillation: nationwide cohort study. CHA₂DS₂-VASc reliably identifies patients who are truly low risk.
BMJ, 2011
Open source
Guideline
Hindricks G, Potpara T, Dagres N, et al. 2020 ESC Guidelines for the diagnosis and management of atrial fibrillation (developed with EACTS) — recommends CHA₂DS₂-VASc for stroke-risk assessment and oral anticoagulation at a score ≥2 in men / ≥3 in women (consider at 1 / 2).
European Heart Journal, 2021
Open source
Last reviewed: 2026-09
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MedScore is an educational and clinical decision-support tool. It does not provide a diagnosis, a treatment, or a drug-dosing recommendation, and it does not replace clinical judgement or local guidelines. Confirm every result against the original source before acting on it. The treating clinician remains responsible for all decisions.