The main mechanism of the CHADS2 and CHA2DS2-VASc scores to predict stroke in non valvular atrial fibrillation (NVAF) is\nstill controversial. We evaluated the association of the CHADS2 and CHA2DS2-VASc scores with left atrial thrombus (LAT) as\ndetected by trans esophageal echocardiographic (TEE) and compared the predictive ability of these risk stratification schemes\nwith non valvular atrial fibrillation (NVAF). Data from 2,695 consecutive NVAF patients in whom TEE was performed for\nscreening LAT from July 2007 to February 2014 were analyzed. Only 3% of the subjects had LAT. Presence of LAT was not\nsignificantly associated with either CHADS2 (
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