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CHA₂DS₂-VASc Score for Atrial Fibrillation Stroke Risk

Clinical prediction rule for estimating the risk of stroke in patients with non-valvular atrial fibrillation.

Age
Sex
Congestive Heart Failure
Or Left Ventricular Dysfunction
Hypertension
History of hypertension or on medication
Stroke / TIA / Thromboembolism
Prior stroke or TIA or thromboembolism
Vascular Disease
e.g. peripheral artery disease, myocardial infarction, aortic plaque
Diabetes Mellitus

Result

CHA₂DS₂-VASc Score

0points
0% annual stroke risk
Recommendation
Low risk. No antithrombotic treatment.

Clinical Notes

  • The CHA₂DS₂-VASc score stratifies the risk of stroke in patients with non-valvular atrial fibrillation.
  • It refines the previous CHADS₂ score by including additional risk factors (Age 65-74, Sex, Vascular Disease).
  • A score of 0 in men or 1 in women indicates low risk, and anticoagulation is generally not required.
  • Source: Lip GY et al. (2010)

About the CHA₂DS₂-VASc Score

The CHA₂DS₂-VASc score is an extension of the CHADS₂ scheme. It extends the latter by including additional common risk factors for stroke. It is used to determine whether or not treatment is required with anticoagulation therapy or antiplatelet therapy.

Mnemonic

  • C: Congestive heart failure (+1)
  • H: Hypertension (+1)
  • A₂: Age ≥ 75 years (+2)
  • D: Diabetes mellitus (+1)
  • S₂: Stroke/TIA/Thromboembolism (+2)
  • V: Vascular disease (prior MI, PAD, or aortic plaque) (+1)
  • A: Age 65-74 years (+1)
  • Sc: Sex category (Female) (+1)

Disclaimer: This tool is intended for educational and reference purposes only. It should not be used as a substitute for professional medical judgment or advice.