CHA2DS2-VASc
Score CHA2DS2-VASc for stroke risk in non-valvular atrial fibrillation.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Hypertension
- Yes
- Age 65-74
- Yes
- Diabetes
- Yes
Result: CHA2DS2-VASc total 3 (consider anticoagulation).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0
- Low risk. Antithrombotic therapy not recommended per source.
- 1
- Low-moderate risk. Oral anticoagulation may be considered per source.
- >=2
- Moderate-to-high risk. Oral anticoagulation recommended per source.
What you enter
- Congestive heart failure (1)
- Hypertension (1)
- Age >= 75 (2)
- Diabetes (1)
- Prior stroke or TIA (2)
- Vascular disease (1)
- Age 65-74 (1)
- Female sex (1)
What this is
Sophie Well sums the weighted points (congestive heart failure, hypertension, age >=75 [2], diabetes, prior stroke/TIA [2], vascular disease, age 65-74, female sex category) and reports the total (0-9) with the conventional annualized stroke-risk band. Source: Lip GYH et al, Chest 2010.
When to use it
Use CHA2DS2-VASc to inform shared-decision conversations about oral anticoagulation in non-valvular atrial fibrillation. Pair the result with HAS-BLED for bleeding risk; neither score replaces guideline-directed therapy decisions or the patient's stated preferences, and CHA2DS2-VASc does not apply to valvular AF, prosthetic valves, or moderate-to-severe mitral stenosis.
How this is calculated
Lip GYH, et al. Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation. Chest. 2010;137(2):263-272. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.
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