实时三维经食管超声心动图在评估非瓣膜性心房颤动患者左心耳血栓形成中的应用

目的 探讨实时三维经食管超声心动图（RT3D-TEE）测量左心耳排空流速（PEV）及三维容积变化率(3D-EF)在预测非瓣膜性房颤患者左心耳自发显影及血栓形成中的应用价值。方法 选取203例心房颤动患者，分为异常组及未见异常组，分别测量左心耳排空流速及三维容积变化率。结果 两组间左心耳排空流速及三维容积变化率有统计学差异，以3D-EF截断值38%预测左心耳自发显影或（和）血栓形成的灵敏性100%，特异度90.6%；以PEV截断值30.85cm/s预测左心耳自发显影或（和）血栓形成的灵敏性100%，特异度89%。结论 实时三维经食管超声心动图检查对预测左心耳自发显影或（和）血栓形成有重要的临床价值。

Real-time three-dimensional transesophageal echocardiography in evaluation of the application for the left atrial appendage thrombosis in patients with nonvalvular atrial fibrillation

Objective To investigate the value of transesophageal three-dimensional echocardiography (RT3D-TEE) in the measurement of left atrial appendage flow velocity (PEV) and the rateof three-dimensional volumetric change (3D-EF) in the prediction of spontaneous echo contrastand thrombosis of left atrial appendage in patients with nonvalvular atrial fibrillation. Methods A total of 203 patients with atrial fibrillation were selected and divided into the groups with abnormality and no abnormality. The left atrial appendage flow velocity and the rate of three-dimensional volumetric change were measured, respectively. Results There were significant differences in left atrial appendage flow velocity and the rate of three-dimensional volumetric change between the two groups. The sensitivity predicted by 38% of the 3D-EF cutoff value of the left atrial appendage spontaneous echo contrast or (and) thrombosis was 100%, and the specificity was 90.6%. The sensitivity predicted by30.85 cm/s of the PEV cutoff value of the left atrial appendage spontaneous echo contrast or (and) thrombosis was 100% and the specificity was 89%. Conclusion Real-time three-dimensional transesophageal echocardiography has important clinical value in predicting left atrial appendage spontaneous echo contrastor (and) thrombosis.