CHA₂DS₂-VASc Score Calculator
Stroke Risk Estimation in Atrial Fibrillation
Patient Factors
Age
Sex Category
Total Score
CHA₂DS₂-VASc
--
Points
Stroke Risk
Adjusted Annual Risk
--%
Recommendation
Select options to see guidelines.
Clinical Reference
The CHA₂DS₂-VASc score is the standard clinical tool for predicting thromboembolic risk in patients with non-valvular atrial fibrillation. It is an extension of the CHADS₂ score, designed to better identify "low risk" patients.
Scoring Criteria
| Acronym | Condition | Points |
|---|---|---|
| C | Congestive Heart Failure | 1 |
| H | Hypertension | 1 |
| A₂ | Age ≥ 75 years | 2 |
| D | Diabetes Mellitus | 1 |
| S₂ | Stroke / TIA / Thromboembolism | 2 |
| V | Vascular Disease | 1 |
| A | Age 65 – 74 years | 1 |
| Sc | Sex Category (Female) | 1 |
Stroke Risk Stratification
Adjusted stroke rate per year based on Swedish Atrial Fibrillation Cohort study (Friberg et al).
| Score | Stroke Risk (%/yr) |
|---|---|
| 0 | 0.2% |
| 1 | 0.6% |
| 2 | 2.2% |
| 3 | 3.2% |
| 4 | 4.8% |
| 5 | 7.2% |
| 6 | 9.7% |
| ≥ 7 | > 10.0% |
References
- Lip GY, et al. Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor-based approach: the euro heart survey on atrial fibrillation. Chest. 2010;137(2):263-72.
- Friberg L, Rosenqvist M, Lip GY. Evaluation of risk stratification schemes for ischaemic stroke and bleeding in 182 678 patients with atrial fibrillation: the Swedish Atrial Fibrillation cohort study. Eur Heart J. 2012;33(12):1500-10.
- January CT, et al. 2019 AHA/ACC/HRS Focused Update of the 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation. Circulation. 2019;140(2):e125-e151.