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
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