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CHA2DS2-VASc Score Calculator

Assess the risk of stroke in patients with non-valvular atrial fibrillation to guide anticoagulation therapy decisions.

Atrial fibrillation (Afib) significantly increases the risk of blood clots forming in the heart, which can travel to the brain and cause a stroke. The CHA2DS2-VASc score is the clinical standard for quantifying this risk. It looks at various health factors—such as age, high blood pressure, and history of heart failure—to determine if the benefits of blood-thinning medication outweigh the risks of bleeding.

Educational use only. This tool does not replace clinical judgment or local protocols.

Age 65–74 and Age ≥ 75 are mutually exclusive.

Result

0

CHA₂DS₂-VASc Score: 0

ItemsNone selected

使い方

The calculator assigns 1 or 2 points to different risk factors. Most notably, a history of stroke or being 75 or older counts for 2 points each, while other factors count for 1.

計算式

Sum of risk factors (max 9 points)

Calculation Examples

1. **High Risk**: A 76-year-old female (2+1 pts) with hypertension (1 pt). Score = **4**. Annual stroke risk is significantly elevated.

Why use this tool in your daily life?

Informed prevention. This service transforms complex medical history into a simple, actionable risk score, enabling life-saving conversations between cardiologists and their patients.

Frequently Asked Questions

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Determine the correct intravenous (IV) infusion rate in ml/hour or drops/minute for precise fluid and medication administration.

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