CHA2DS2-VASc Score
|
|
Risk Factor |
Score |
|
C |
Congestive heart failure / Left ventricular dysfunction |
1 |
|
H |
Hypertension - high blood pressure |
1 |
|
A2 |
Age > 75 years |
2 |
|
D |
Diabetesmellitus |
1 |
|
S2 |
Stroke / TIA / TE (thromboembolism) |
2 |
|
V |
Vascular disease - coronary artery disease (CAD) |
1 |
|
A |
Age 65 - 74 |
1 |
|
Sc |
Sex category - Female gender |
1 |
Table 1: 2009 Birmingham Schema, CHA2DS2-VASc Scoring System
Source: Adapted from Table 1(b), Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor based approach: The Euro Heart Survey on Atrial Fibrillation, Chest
In the CHA2DS2-VASc Scoring System above, high risk equals a score of two or greater.
|
CHA2DS2-VASc Score |
Patients (n = 7329) |
Adjusted Stroke rate (%/year) |
|
0 |
1 |
0 |
|
1 |
422 |
1.3 |
|
2 |
1230 |
2.2 |
|
3 |
1730 |
3.2 |
|
4 |
1718 |
4.0 |
|
5 |
1159 |
6.7 |
|
6 |
679 |
9.8 |
|
7 |
294 |
9.6 |
|
8 |
82 |
6.7 |
|
9 |
14 |
15.2 |
Table 2: Predicted stroke rate.
The flow chart below is an additional way of identifying who should be on anticoagulants.
|
Q1 |
Age 75 or greater? |
Yes->OAC |
No->Go to Q2 |
|
Q2 |
History of stroke, TIA or |
Yes->OAC |
No->Go to Q3 |
|
Q3 |
Gender? |
Male |
Female |
|
Risk Factors
|
Male+two or more risk factors |
Female+any other risk factor |
|
| OAC = Oral Anticoagulant | |||
Table 3: Flow Chart for Use of Oral Anticoagulation (OAC) for Stroke Prevention in Atrial Fibrillation
Source: Adapted from Figure 1, Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor based approach: The Euro Heart Survey on Atrial Fibrillation, Chest