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CHA2DS2-VASc Score Calculator

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This calculator assesses stroke risk in patients with atrial fibrillation using the CHA2DS2-VASc score. The score helps to determine the need for stroke prevention therapy, such as anticoagulants.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Age, History of Hypertension, Abnormal Renal Function, History of Stroke, TIA, or Thromboembolism, History of Vascular Disease (prior MI, PAD, or aortic plaque), Diabetes Mellitus, History of Heart Failure, and Sex in the units shown.

Step 2

Read Total CHA2DS2-VASc Score, Recommendation for Antithrombotic Therapy, and Estimated Stroke Risk (per year) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Patient with no risk factors

Age: Less than 65 years; History of Hypertension: No; Abnormal Renal Function: No; History of Stroke, TIA, or Thromboembolism: No; History of Vascular Disease (prior MI, PAD, or aortic plaque): No; Diabetes Mellitus: No; History of Heart Failure: No; Sex: Male

Total CHA2DS2-VASc Score: 0; Recommendation for Antithrombotic Therapy: No antithrombotic therapy is generally recommended. Consider other risk factors and patient preferences.; Estimated Stroke Risk (per year): Low (0%)

Patient with hypertension

Age: Less than 65 years; History of Hypertension: Yes; Abnormal Renal Function: No; History of Stroke, TIA, or Thromboembolism: No; History of Vascular Disease (prior MI, PAD, or aortic plaque): No; Diabetes Mellitus: No; History of Heart Failure: No; Sex: Male

Total CHA2DS2-VASc Score: 1; Recommendation for Antithrombotic Therapy: Consider oral anticoagulation or aspirin. Shared decision-making is important.; Estimated Stroke Risk (per year): Low-Moderate (1.3%)

Patient with stroke history

Age: Less than 65 years; History of Hypertension: No; Abnormal Renal Function: No; History of Stroke, TIA, or Thromboembolism: Yes; History of Vascular Disease (prior MI, PAD, or aortic plaque): No; Diabetes Mellitus: No; History of Heart Failure: No; Sex: Male

Total CHA2DS2-VASc Score: 2; Recommendation for Antithrombotic Therapy: Oral anticoagulation is generally recommended.; Estimated Stroke Risk (per year): Moderate (2.2%)

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Important

Use the result as an estimate and confirm any medical decisions with a qualified professional.