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As for nonvalvular atrial fibrillation (NVAF) patients with left atrial thrombus or spontaneous echo contrast (LAT/SEC), we evaluated the additional predictive value of serum uric acid (SUA) and Left atrial diameter (LAD) for CHADS 2 and CHA 2 DS 2 -VASc, and explored the influence from the level of SUA and LAD to LAT/SEC in moderate risk group. Thus, we put forward the concept of a borderline high risk group to guide clinical anticoagulant therapy in patients with NVAF.A total of 284 NVAF patients without the history of anticoagulant prior to hospitalization were enrolled. They were divided into LAT/SEC group or No LAT/SEC group according to transesophageal echocardiography (TEE). Then, we explored and compared the additional predictive value of serological and ultrasonic indexes after combining them to CHADS 2 /CHA 2 DS 2 -VASc.61 patients (21.48%) had LAT/SEC. SUA and LAD were the independent risk factors of LAT/SEC. After being added with LAD and SUA, the predictive value of CHADS 2 and CHA 2 DS 2 -VASc were increased much more than others. In the moderate risk group, the incidence of LAT/SEC rose significantly when SUA or LAD was higher than cut-off values.SUA and LAD enhanced the predictive ability of CHADS 2 and CHA 2 DS 2 -VASc for LAT/SEC as additional factors. For patients in moderate risk group, if SUA or LAD was higher than cut-off values, the risk of thromboembolism events would rise accompanied by the elevated risk of LAT/SEC.

The Refinement of Risk Stratification for Atrial Thrombus or Spontaneous Echo Contrast in Nonvalvular Atrial Fibrillation