CHADS2 Stroke Risk Score Calculator
Medicine & Clinical ToolsCalculate the CHADS2 score, used to estimate stroke risk in patients with atrial fibrillation.
CHADS2 Score
The total CHADS2 score, used as a reference tool for estimating annual stroke risk in patients with atrial fibrillation. Clinical decisions should follow current guidelines and physician judgment.
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Odeh AhwalBased on 3 sources
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Calculator Stats
Creators
Odeh AhwalBased on 3 sources
0people find this calculator helpful
Views
Helpful
Saved
Embeds
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Frequently Asked Questions
What does the CHADS2 score estimate?
CHADS2 is a clinical scoring tool that estimates annual stroke risk in patients with atrial fibrillation, commonly used to help guide decisions about anticoagulation therapy.
Has CHADS2 been superseded by newer scoring tools?
Many clinical guidelines now favor the more comprehensive CHA2DS2-VASc score, which adds additional risk factors for more refined risk stratification, particularly useful for identifying truly low-risk patients.
Does a higher CHADS2 score always mean anticoagulation is required?
Treatment decisions depend on the full clinical picture and current guideline recommendations, not the score alone — this tool is intended as an educational reference, not a substitute for clinical decision-making.
Sources
- Validation of clinical classification schemes for predicting stroke: results from the National Registry of Atrial Fibrillation, PubMed (JAMA, Gage et al., 2001)
- CHADS₂ Score for Atrial Fibrillation Stroke Risk Calculator, MDCalc
- 2023 ACC/AHA/ACCP/HRS Guideline for the Diagnosis and Management of Atrial Fibrillation, PubMed (J Am Coll Cardiol, American Heart Association / American College of Cardiology, 2023)
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