CHA₂DS₂-VASc Score Calculator
The CHA₂DS₂-VASc Score is a clinical tool used to estimate the risk of stroke in patients with non-valvular atrial fibrillation (AF). This calculator helps healthcare providers determine whether anticoagulation therapy is recommended. Based on risk factors such as age, gender, and medical history, a higher score indicates a greater stroke risk.
CHA₂DS₂-VASc Score for Stroke Risk
CHA₂DS₂-VASc Scoring Formula
Where:
- $$C$$ = 1 if Congestive heart failure/LV dysfunction
- $$H$$ = 1 if Hypertension
- $$A_1$$ = 2 if Age ≥ 75 years
- $$D$$ = 1 if Diabetes mellitus
- $$S_2$$ = 2 if Prior stroke/TIA/thromboembolism
- $$V$$ = 1 if Vascular disease (e.g., MI, PAD, aortic plaque)
- $$A_2$$ = 1 if Age 65–74 years
- $$Sc$$ = 1 if Sex category is female
The CHA₂DS₂-VASc Score refines the older CHADS₂ Score by including additional risk factors such as vascular disease and female sex. It stratifies patients with atrial fibrillation into low, moderate, and high risk for stroke, aiding in decisions regarding the use of oral anticoagulants. For example, a 78-year-old female with hypertension and diabetes would receive a score of 5, indicating a high risk and likely need for anticoagulation. This score is commonly used in clinical guidelines for stroke prevention in AF.