Stroke Risk Assessment in Patients with Atrial Fibrillation

CHADS2 Score

Gage BF et al.  JAMA 2001; 285: 2864-70

Scoring

CHADS2 Criteria Score
CHF 1
HTN 1
Age > 75 1
Diabetes 1
Stroke/TIA 2

Stroke Risk

CHADS2 Score Annualized Stroke Risk
0 1.9%
1 2.8%
2 4.0%
3 5.9%
4 8.5%
5 12.5%
6 18.2%

CHADS2Vasc Score

Lip GY et al.  Chest 2010; 137: 263-72

Scoring

CHADS2Vasc Criteria Score
CHF 1
HTN 1
Age > 75 2
Diabetes 1
Stroke/TIA/systemic embolism 2
Vacular disease (CAD, MI, PAD, aortic plaque) 1
Age 65-74 1
Female 1

Stroke risk

CHADS2-Vasc Score

Annualize Stroke Risk in Original Study

(Chest 2010; 137: 263-72)

Theoretical Thromboembolic Rates Without Therapy

(Stroke 2010; 41:2731-2738

0 0 0
1 0.6% 1.3%
2 1.6% 2.2%
3 3.9% 3.2%
4 1.9% 4.0%
5 3.2% 6.7%
6 3.6% 9.8%
7 8.0% 9.6%
8 11.1% 6.7%
9 100% (n=1 in original study) 15.2%