Compare: stroke vs bleeding
Side-by-side CHA₂DS₂-VASc and HAS-BLED — the standard AFiB anticoagulation decision.
In atrial fibrillation, the decision to start oral anticoagulation balances stroke risk (CHA₂DS₂-VASc) against bleeding risk (HAS-BLED). A high HAS-BLED score is rarely a reason to withhold anticoagulation; it's a flag for closer monitoring and reversible-factor review.
Stroke risk · CHA₂DS₂-VASc
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Score1moderate risk
Oral anticoagulation should be considered (ESC Class IIa).
- Annual stroke risk
- 0.6%
- Evidence grade
- B
Bleeding risk · HAS-BLED
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Score0low risk
Low bleeding risk; anticoagulation is not precluded.
- Annual major bleeding risk
- 1.1%
- Evidence grade
- A
Both scores are computed in your browser. Reference: 2024 ESC AFiB Guidelines (PMID 39210723).