CHADS2 score

Stroke risk for nonrheumatic atrial fibrillation

Scoring system

Congestive Heart Failure (1 point)
Hypertension > 160mm Hg / treated hypertension (1 point)
Age > 75 years (1 point)
Diabetes (1 point)
S2 Prior Stroke or TIA (2 points)

Recommended anticoagulation therapy

CHADS2 score 0

Aspirin 75-80mg daily

CHADS2 score 1 - 2

Aspirin 75-80mg daily or Warfarin (INR 2,0 - 3,0)

CHADS2 score 3 - 6

Warfarin (INR 2,0 - 3,0)

Reference

Gage et al. Selecting patients with atrial fibrillation for anticoagulation: stroke risk stratification in patients taking aspirin. Circulation (2004) vol. 110 (16) pp. 2287-92