The CHADS₂ score and its updated version, the CHA₂DS₂-VASc score, are clinical prediction rules for estimating the risk of stroke in people with non-rheumatic atrial fibrillation, a common and serious heart arrhythmia associated with thromboembolic stroke.
What is CHADS score used for?
The CHADS2 score can help physicians estimate stroke risk in patients with non-valvular atrial fibrillation and determine which antithrombotic therapy is most appropriate. Studies have found that as the CHADS2 score increases, the annual risk of ischemic stroke increases proportionally.
What is a good Chad score?
In both scoring systems, a score of 0 is "low" risk of stroke, 1 is "moderate", and any score above 1 is a "high" risk. The CHADS2-VASc system, with having three more potential variables, inevitably classifies more patients into a high-risk group.
