CHA2DS2-VASc Score Calculator

Enter Patient Factors

Select applicable conditions. Age controls the age-related points automatically.

Age (years)

65–74 gives 1 point, 75+ gives 2 points.

Please enter a valid age.

Sex category

Female sex adds 1 point in the score.

Please choose an option.

Congestive heart failure / LV dysfunction

Clinical diagnosis or documented dysfunction.

Hypertension

History of hypertension or treated BP.

Diabetes mellitus

Type 1 or type 2 diabetes.

Prior stroke / TIA / thromboembolism

History of stroke, TIA, or systemic embolism.

Vascular disease

CAD, PAD, or aortic plaque.

Reset

Tip: For documentation, calculate first, then use the export buttons shown above.

Example Data Table

Sample inputs and typical outputs for quick validation.

Age	Sex	CHF	HTN	DM	Stroke/TIA	Vascular	Score	Tier
58	Male	No	No	No	No	No	0	Low
67	Female	No	Yes	No	No	No	3	Higher
79	Male	Yes	Yes	Yes	No	Yes	6	Higher

Example rows are illustrative and not clinical advice.

Formula Used

The score is the sum of weighted risk factors:

CHF/LV dysfunction = 1 point
Hypertension = 1 point
Age 75 or above = 2 points
Age 65 to 74 = 1 point
Diabetes mellitus = 1 point
Prior stroke/TIA/thromboembolism = 2 points
Vascular disease = 1 point
Female sex category = 1 point

Total score range is 0 to 9. Age points are mutually exclusive.

How to Use This Calculator

Enter the patient’s age and sex category.
Select “Yes” for each applicable clinical factor.
Click “Calculate Score” to view results above the form.
Review the points breakdown for documentation.
Use CSV or PDF export to share or store the result.
Interpret results alongside bleeding risk and guidelines.

FAQs

1) What is this score used for?

It estimates stroke risk in atrial fibrillation or flutter by summing common clinical risk factors. It supports anticoagulation discussions and documentation.

2) Why does age have two different point values?

Age is strongly associated with stroke risk. The model assigns 1 point for 65–74 and 2 points for 75 or above, never both.

3) Does female sex always mean higher risk?

Female sex adds one point, but many guidelines treat “sex-only” scoring as low risk. Risk rises mainly when other factors are present.

4) What counts as vascular disease?

Common examples include coronary artery disease, prior myocardial infarction, peripheral arterial disease, or significant aortic plaque.

5) Should I start anticoagulation based on this score alone?

No. Decisions also depend on bleeding risk, patient preferences, contraindications, and updated guideline recommendations. Use this as one input.

6) Is this tool appropriate for valvular atrial fibrillation?

Risk assessment and therapy differ in moderate-to-severe mitral stenosis or mechanical valves. Follow condition-specific guidance rather than this score.

7) Why doesn’t the result show an exact annual percentage risk?

Percent estimates vary by study population, treatment era, and endpoints. Tiered interpretation is more stable for education and documentation.

8) Can I use the export files in medical records?

Exports are for convenience. Ensure your organization’s policies are followed and remove identifiers if sharing externally. Confirm final documentation clinically.