[Risk stratification tools for evaluating thromboembolic risk in atrial fibrillation].

New European recommendations on management of stroke prevention in atrial fibrillation have been published. They introduce a new risk stratification score called CHA2DS2VASc, which may allow for better thromboembolic risk discrimination amongst low risk patients. We review stroke risk stratification in atrial fibrillation, limitations of available scores and discuss the practical implications of the new recommendations.