The<unk>  score and its updated version, the<unk> , are clinical prediction rules for estimating the risk of stroke in people with non-rheumatic atrial fibrillation (AF), a common and serious heart arrhythmia associated with thromboembolic stroke. Such a score is used to determine whether or not treatment is required with anticoagulation therapy or antiplatelet therapy, since AF can cause stasis of blood in the upper heart chambers, leading to the formation of a mural thrombus that can dislodge into the blood flow, reach the brain, cut off supply to the brain, and cause a stroke. A high score corresponds to a greater risk of stroke, while a low score corresponds to a lower risk of stroke. The<unk>  score is simple and has been validated by many studies. In clinical use, the<unk>  score (pronounced "chads two") has been superseded by the<unk>  ("chads<unk> "), which gives a better stratification of low-risk patients.
CHA2DS2–VASc score
Fibrin degradation product
EuroSCORE
HeartScore
FibroTest
Thrombin time
Coagulation activation marker
FACE risk profile