Quickly and accurately assess the risk of stroke in patients with non-valvular atrial fibrillation using our evidence-based CHA2DS2-VASc calculator. This tool helps clinicians and patients make informed decisions about anticoagulation therapy based on the latest guidelines.
CHA2DS2-VASc Score: 0
Adjusted Annual Stroke Risk:
Interpretation:
The CHA2DS2-VASc score is a clinical prediction rule used to estimate the yearly risk of stroke in patients with non-valvular atrial fibrillation (AFib). This validated tool helps healthcare providers determine whether anticoagulation therapy is appropriate for individual patients.
Each component of the acronym represents a specific risk factor: Congestive heart failure,Hypertension, Age ≥75 years (doubled), Diabetes,Stroke/TIA (doubled), Vascular disease, Age 65-74 years, and Sc for sex category (female). The score ranges from 0 to 9 points, with higher scores indicating greater stroke risk.
This calculator is based on the latest American Heart Association, American College of Cardiology, and Heart Rhythm Society guidelines for the management of atrial fibrillation.
| Score | Annual Stroke Risk | Recommendation |
|---|---|---|
| 0 | 0.2% | Low risk - No anticoagulation |
| 1 | 0.6% | Consider anticoagulation (males) |
| 2+ | 2.2% - 12.2% | Oral anticoagulation recommended |
Important: Before starting anticoagulation, consider assessing bleeding risk using the HAS-BLED calculator to ensure the benefits outweigh the risks.
A 76-year-old female patient presents with newly diagnosed atrial fibrillation. Her medical history includes hypertension and a previous myocardial infarction (heart attack) 3 years ago.
✓ Age ≥ 75 years: +2 points
✓ Hypertension: +1 point
✓ Vascular Disease (Prior MI): +1 point
✓ Sex Category (Female): +1 point
Total CHA2DS2-VASc Score: 5 points
Annual stroke risk: 7.2% - Oral anticoagulation strongly recommended
Cardiology, Electrophysiology
Dr. Eleanor Vance is a board-certified cardiologist with over 15 years of experience specializing in cardiac electrophysiology and the management of atrial fibrillation. After graduating summa cum laude from Johns Hopkins School of Medicine, she completed her residency at Massachusetts General Hospital and a fellowship in cardiology at the Cleveland Clinic.
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