The CHA
2
DS
-VASc system is another risk factor–
based schema for predicting stroke and thromboembolism
in patients with AF. It incorporates additional
risk factors that are not included in CHADS
2
. In a validation
study,
CHA
2
DS
2
2
-VASc was found to be superior
to CHADS
in differentiating patients with high-risk
AF from those with low-risk AF.
2
6