CHA2DS2-VASc Score Calculator
Calculate your CHA2DS2-VASc score to assess stroke risk in patients with atrial fibrillation.
Input risk factors
Provide the patient's age and CHF history to compute a quick score. The form treats empty fields as zero so you can explore scenarios without waiting.
The score shown on the right updates once you hit Calculate or pause briefly after editing an input.
CHA2DS2-VASc score
0
Risk level: Low
The calculator adds the numeric age and the CHF flag (0 = no, 1 = yes). Scores ≥ 2 usually prompt discussion about anticoagulation.
How to Use This Calculator
This calculator helps determine the stroke risk for patients with atrial fibrillation. It is intended for healthcare professionals and informed patients to guide treatment conversations.
Start by entering the patient's age in years and select whether they have a history of congestive heart failure. Click Calculate or wait briefly after editing the dropdown to refresh the summary.
Methodology
The calculations rely on the CHA2DS2-VASc scoring system described in the 2010 European Society of Cardiology guidelines. Each risk factor carries an integer weight; the total score estimates annual stroke risk and helps clinicians choose appropriate anticoagulation strategies.
Glossary of variables
- Age: Patient's age in completed years.
- History of congestive heart failure: Assign 1 point if the patient has a documented history, 0 otherwise.
Practical example
Consider a 72-year-old patient with hypertension and diabetes. The score is calculated as: Age (2 points for being ≥ 75) + Hypertension (1) + Diabetes (1) = 4. This example demonstrates why older patients accumulate points quickly.
Frequently Asked Questions
What is the CHA2DS2-VASc score?
The CHA2DS2-VASc score is a clinical prediction rule for estimating the risk of stroke in patients with atrial fibrillation.
How do I use the CHA2DS2-VASc calculator?
Input the relevant clinical data into the calculator to determine the stroke risk score.
What does a high CHA2DS2-VASc score mean?
A higher score indicates a greater risk of stroke, which may require medical intervention such as anticoagulation.