CHADS2 Scores May Understate Atrial Fibrillation Stroke Risk

New research from Denmark shows that CHADS₂ underestimates stroke risk. In the study, atrial fibrillation patients who were at intermediate risk with the CHADS₂ scoring system had more than twice the stroke rate of those defined by the enhanced CHA₂DS₂-VASc tool as being at intermediate risk. While CHADS₂ deemed 32.3% of patients to have intermediate risk, CHA₂DS₂-VASc categorized nearly all of these patients (92.7%) as being at high stroke risk.

Learn more: Stroke Risk Tool CHA₂DS₂-VASc Better Than CHADS₂ for Certain Atrial Fibrillation Patients