CHADS2 Scores May Understate Atrial Fibrillation Stroke Risk

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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

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