Table 3.4-3. Assessment of the risk of stroke in patients with atrial fibrillation not associated with valvular heart disease

Risk factor

Score

CHADS2

CHA2DS2-VASc

Congestive heart failure or left ventricular dysfunctiona

1

1

Hypertension

1

1

Age ≥75 years

1

2

Diabetes mellitus

1

1

History of stroke, transient ischemic attack, or thromboembolisma

2

2

Vascular diseaseb

1

Age 65-74 years

1

Female sex

1

a Left ventricular dysfunction and other thromboembolic event are included only in the CHA2DS2-VASc score.

b History of myocardial infarction, peripheral artery disease, or atherosclerotic plaque in aorta.