CHA₂DS₂-VASc Score
Stroke risk in atrial fibrillation
This calculator is a support tool intended exclusively for health professionals. It does not replace clinical judgment. The final decision regarding diagnosis and treatment is the sole responsibility of the professional.
Patient Data
Result
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About this Calculator 💡
The CHA₂DS₂-VASc Score is a widely used risk assessment tool in clinical practice to determine the likelihood of a patient with Atrial Fibrillation (AF) developing an ischemic Stroke (CVA) or another thromboembolic event. This scale is crucial because AF, a common heart arrhythmia, drastically increases the risk of stroke due to blood stagnation in the heart, which can lead to clot formation. The acronym is a mnemonic representing the risk factors considered. The total score ranges from 0 to 9 and guides the patient's stroke prevention strategy. The primary goal of the scale is to identify those patients who will benefit most from treatment with oral anticoagulants, which are highly effective in reducing stroke risk. Low scores (0 in men, 1 in women without other factors) indicate low risk, while scores of 2 or more in men (or 3 or more in women) indicate high risk and strong recommendation for anticoagulation. This tool is vital for a balanced clinical decision, helping to weigh the benefit of reducing stroke risk against the bleeding risk associated with anticoagulant use.
Reference Values
- • 0 points: Low risk (0%/year) - No anticoagulation
- • 1 point: Low-moderate risk (1.3%/year) - Consider anticoagulation
- • ≥2 points: Moderate-high risk (≥2.2%/year) - Anticoagulation recommended
Formula
C + H + A₂ + D + S₂ + V + A + Sc (sum of points)