CHA₂DS₂-VASc Score Calculation and Clinical Implications

Risk Stratification and Clinical Implications

• The American College of Cardiology recommends oral anticoagulation for patients with CHA₂DS₂-VASc scores ≥2, with a score of 4 corresponding to an adjusted annual stroke rate of 4.0% 1, 2
• The European Society of Cardiology guidelines recommend using CHA₂DS₂-VA, which would give a patient with similar risk factors a score of 3, still indicating high risk 3
• The American College of Cardiology, American Heart Association, and Heart Rhythm Society recommend oral anticoagulation for patients with CHA₂DS₂-VASc scores ≥2, with direct oral anticoagulants preferred over warfarin in eligible patients 2

Important Clinical Considerations

• The European Heart Journal notes that age is scored in two separate categories - 1 point for 65-74 years AND 2 additional points if ≥75 years, and that women receive 1 point for sex alone, meaning the minimum possible score for any woman is 1 1, 3
• The American College of Cardiology and European Heart Journal recommend concurrent assessment using HAS-BLED score to identify modifiable bleeding risk factors, with a HAS-BLED score ≥3 suggesting caution and need for regular review 1, 5