C
hronic heart failure
Yes
No
H
ypertension
Yes
No
A
ge ≥ 75 years
Yes
No
D
iabetes Mellitus
Yes
No
Previous
S
troke or TIA
Yes
No
CHADS2 risk of stroke % per year in patients with non rheumatic AF:
CHADS2 Score
Stroke Risk %
0
1.9
1
2.8
2
4.0
3
5.9
4
8.5
5
12.5
6
18.2
Recommendations for anticoagulation
Score 0
- Low risk, consider Aspirin
Score 1
- Moderate risk, Aspirin
Score 2 and above
- High risk, Warfarin indicated to maintain INR between 2 -3 (unless contraindicated or patient refuses)