Cha2ds2 Vasc Score Calculator
Calculate CHA2DS2-VASc score for stroke risk stratification in atrial fibrillation patients. Enter values for instant results with step-by-step formulas.
Formula
CHA2DS2-VASc = CHF(1) + Hypertension(1) + Age≥75(2) + Diabetes(1) + Stroke/TIA(2) + Vascular(1) + Age 65-74(1) + Female(1)
Each risk factor adds points to the total. Age ≥75 and prior Stroke/TIA are weighted double (2 points each). Maximum score is 9. Higher scores indicate greater annual stroke risk and stronger indication for anticoagulation therapy.
Worked Examples
Example 1: Low Risk Assessment
Problem: 65-year-old male with hypertension and no other risk factors.
Solution: Hypertension: +1\nAge 65-74: +1\nTotal CHA2DS2-VASc = 2\nAnnual stroke risk: 2.2%\nRecommendation: Oral anticoagulation recommended
Result: CHA2DS2-VASc 2 — Moderate-High Risk, anticoagulation recommended
Example 2: High Risk Assessment
Problem: 78-year-old female with CHF, diabetes, and prior stroke.
Solution: CHF: +1\nAge ≥75: +2\nDiabetes: +1\nStroke: +2\nSex (female): +1\nTotal CHA2DS2-VASc = 7\nAnnual stroke risk: 11.2%\nRecommendation: Oral anticoagulation strongly recommended
Result: CHA2DS2-VASc 7 — High Risk, anticoagulation strongly recommended
Frequently Asked Questions
What is the CHA2DS2-VASc score?
The CHA2DS2-VASc score is a clinical prediction tool used to estimate stroke risk in patients with non-valvular atrial fibrillation (AF). It helps clinicians decide whether anticoagulation therapy is warranted. The acronym stands for: Congestive heart failure, Hypertension, Age ≥75 (doubled), Diabetes, Stroke (doubled), Vascular disease, Age 65-74, and Sex category (female). Scores range from 0 to 9, with higher scores indicating greater annual stroke risk.
How does CHA2DS2-VASc differ from CHADS2?
CHA2DS2-VASc is an updated version of the original CHADS2 score. It adds three additional risk factors: vascular disease, age 65-74, and female sex. This refinement better identifies truly low-risk patients (score 0) who may not need anticoagulation, while reclassifying many moderate-risk patients into higher risk categories warranting treatment.
What is the annual stroke risk for each score?
Approximate annual stroke rates: Score 0: 0.2%, Score 1: 0.6%, Score 2: 2.2%, Score 3: 3.2%, Score 4: 4.8%, Score 5: 7.2%, Score 6: 9.7%, Score 7: 11.2%, Score 8: 10.8%, Score 9: 12.2%. These percentages are derived from validation studies and represent adjusted stroke rates per year without anticoagulation.
Can I use Cha2ds2 Vasc Score Calculator on a mobile device?
Yes. All calculators on NovaCalculator are fully responsive and work on smartphones, tablets, and desktops. The layout adapts automatically to your screen size.
Can I use the results for professional or academic purposes?
You may use the results for reference and educational purposes. For professional reports, academic papers, or critical decisions, we recommend verifying outputs against peer-reviewed sources or consulting a qualified expert in the relevant field.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.