Anticoagulation for Atrial Fibrillation: Is This the End of Warfarin? Not Just Yet
Table 1
How the two most commonly used stroke risk scoring systems can be calculated: CHADS2 has a maximum of six points and CHA2DS2-VASc a maximum of nine points, where the higher the number of points scored equates to higher thromboembolic risk.
CHADS2
Condition
Points allocated
CHA2DS2-VASc
Condition
Points allocated
C
Congestive heart failure or left ventricular (LV) dysfunction with ejection fraction (EF) ≤ 40%
1
C
Congestive heart failure or left ventricular (LV) dysfunction with ejection fraction (EF) ≤ 40%
1
H
Hypertension
1
H
Hypertension
1
A
Age ≥ 75
1
A2
Age ≥ 75
2
D
Diabetes
1
D
Diabetes
1
S2
Transient ischemic attack (TIA), stroke, or another thromboembolism
2
S2
Transient ischemic attack (TIA), stroke, or another thromboembolism