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CHA₂DS₂-VASc Score for AF Stroke Risk

Stroke risk in non-valvular AF — its real job is identifying who can safely skip anticoagulation, not who needs it.

Low risk
CHA₂DS₂-VASc 0 · ~0.2–0.8%/yr stroke risk
No anticoagulation
0pts
Age
CHF / LV dysfunction (EF ≤40%)
Hypertension
Diabetes mellitus
Prior stroke, TIA, or thromboembolism
Vascular disease (prior MI, PAD, or aortic plaque)
Female sex
For non-valvular AF only · Maximum 9 (age maxes at 2) · If the only point is female sex, the patient is low-risk — do not anticoagulate on that point alone. Pair with HAS-BLED to address modifiable bleeding risk, never to justify withholding anticoagulation.