These clots can leave the heart and cause a stroke
when they lodge in the brain. The CHADS2 scoring system is a way to assess the annual stroke
risk for a patient in atrial fibrillation, based on other risk factors. CHADS2 is an acronym for Congestive heart failure, Hypertension, Age greater than 75, Diabetes, and history of Stroke. If your meet none of these criteria, your CHADS2 score is 0, and you have about a 1.9% annual risk of stroke with atrial fibrillation.