CHA2DS2-VASc Calculator
The CHA2DS2-VASc score is a clinical prediction rule for estimating the risk of stroke in patients with non-rheumatic atrial fibrillation (AF), a common and serious heart arrhythmia associated with thromboembolic stroke. It is used to determine whether or not treatment is required with anticoagulation therapy or antiplatelet therapy.
Patient Information
| Age: | |
| Sex: | |
Medical History |
|
| Congestive Heart Failure: | |
| Hypertension: | |
| Diabetes Mellitus: | |
| Stroke/TIA/Thromboembolism: | |
| Vascular Disease: | |
Score Components
| Risk Factor | Points |
|---|---|
| Congestive heart failure | 1 |
| Hypertension | 1 |
| Age ≥75 years | 2 |
| Diabetes mellitus | 1 |
| Stroke/TIA/Thromboembolism | 2 |
| Vascular disease | 1 |
| Age 65-74 years | 1 |
| Sex category (female) | 1 |
About CHA2DS2-VASc Score
The CHA2DS2-VASc score is an evolution of the CHADS2 score and is used to assess stroke risk in patients with atrial fibrillation. The acronym stands for:
- C - Congestive heart failure (1 point)
- H - Hypertension (1 point)
- A2 - Age ≥75 years (2 points)
- D - Diabetes mellitus (1 point)
- S2 - Stroke/TIA/Thromboembolism history (2 points)
- V - Vascular disease (1 point)
- A - Age 65-74 years (1 point)
- Sc - Sex category (female) (1 point)
Risk Stratification
| CHA2DS2-VASc Score | Annual Stroke Risk | Recommendation |
|---|---|---|
| 0 (males) or 1 (females) | 0.2-0.3% | No anticoagulation |
| 1 (males) or 2 (females) | 0.9-1.3% | Consider anticoagulation |
| ≥2 (males) or ≥3 (females) | 2.2-15.2% | Anticoagulation recommended |
Clinical Application
The CHA2DS2-VASc score helps clinicians make evidence-based decisions about anticoagulation therapy in patients with atrial fibrillation. It provides a more comprehensive risk assessment than the original CHADS2 score by including additional risk factors such as vascular disease and female sex.
Patients with higher scores have increased stroke risk and typically benefit from anticoagulation therapy, while those with lower scores may not require anticoagulation or may be candidates for antiplatelet therapy.
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