Anticoagulation for atrial fibrillation – CHADS2

Decision

What method of anticoagulation is appropriate given the risk of thromboembolism.

Population

Clinic patients with atrial fibrillation

Components

Congestive heart failure = 1 point
Hypertension = 1 point
Age > 75 = 1 point
Diabetes mellitus = 1 point
Stroke/TIA = 2 points

Consider against risk of significant bleed (HAS BLED score)

Score

Score – annual stroke risk:
0 – 1.9%
1 – 2.8%
2 – 4.0%
3 – 5.9%
4 – 8.5%
5 – 12.5%
6 – 18.2%

Reference

Gage BF. JAMA 2001;285 (22): 2864–70.