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The CHADS2 score is a validated stroke risk assessment tool for patients with AF that was first presented at the 2001 International Stroke Meeting. It is used to determine whether or not treatment is required with anticoagulation therapy or antiplatelet therapy. A high CHADS2 score corresponds to a greater risk of stroke, while a low CHADS2 score corresponds to a lower risk of stroke. Adding together the points that correspond to the conditions that a patient has will result in the CHADS2 score that is used to estimate stroke risk. The possible score is 0-6:
Stroke risk assessment should always include an assessment of bleeding risk. This can be done using validated bleeding risk scores, such as a HEMORR2HAGES or HAS-BLED scores.
Gage BF, Waterman AD, Shannon W, Boechler M, Rich MW, Radford MJ. Validation of clinical classification schemes for predicting stroke: results from the National Registry of Atrial Fibrillation. JAMA. 2001 Jun 13;285(22):2864-70.
Lip GY, Nieuwlaat R, Pisters R, Lane DA, Crijns HJ. Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor-based approach: the euro heart survey on atrial fibrillation. Chest. 2010 Feb;137(2):263-72. Epub 2009 Sep 17.
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