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《Chinese Journal of Medical Imaging Technology》 2008-02
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Assessment of the left atrial appendage function by strain rate imaging and tissue velocity imaging in patients with atrial fibrillation

JIANG Xin-kui, MU Yu-ming, HAN Wei,GULIQIMAN·Huojiaabudula (Department of Echocardiograph, the First Affiliated Hospital, Xinjiang Medical University, Urmuqi 830000, China)  
Objective To assess left atrial appendage (LAA) function by using strain rate imaging (SRI) and tissue velocity imaging (TVI) in patients with persistent atrial fibrillation (AF). Methods Thirty-one controls and 29 persistent AF patients are studied. The parameters of SRI and TVI are performed with offline analysis in 5 segments of LAA wall. Results At the tip of LAA, Ssr, Dsr, PSV and PDVE are higher than other segments in control group (P0.01). In AF group, the tip Ssr and PSV are higher than the middle part of the lateral and the septal wall (P0.05), while the tip Dsr is higher than the middle part of the septal wall (P0.05). Ssr and PSV taken from the tip of the LAA are positively correlated with LAA-EV and LAA-EF (r=0.724, 0.637, 0.656, 0.712,P0.001, respectively). In control group, Ssr taken from the tip of the LAA were positively correlated with LAA-EV and LAA-EF (r=0.724, 0.637, P0.001, respectively). In AF group, Ssr taken from the tip of the LAA were negatively correlated with left atrium dimension (r=-0.528, P0.01). PSV taken from the tip of the LAA are negatively correlated with LADd (r=-0.66, P0.001). At the tip of LAA, PSV and PDVE are higher in control group than AF group (P0.01). Conclusion SRI combined with TVI have high evaluative values in assessing LAA function. The tip Ssr and PSV play an important role in evaluating LAA systolic function. The movements of LAA in AF patients are out of coordination.
【CateGory Index】: R541.75
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