摘要
目的通过研究封堵器介入治疗房间隔缺损术后患者心房应变,对比斑点追踪显像及组织多普勒应变显像两种方法对心房功能评价的价值。方法对封堵器介入治疗房间隔缺损成功的40例患者于术后1周内进行超声心动图检查,应用组织多普勒应变显像及斑点追踪显像技术分别测量左心房封堵器处及左心房侧壁应变,对比两种方法评价心房功能的可靠性。结果两种测量方法的可重复性及后处理分析时间差异无统计学意义。两种方法均显示左心房侧壁应变显著高于封堵器局部应变(组织多普勒:47.31%±27.25%vs30.06%±14.29%,P<0.01;斑点追踪:43.49%±25.55%vs12.74%±9.16%,P<0.001)。两种方法评价侧壁应变无差异,但斑点追踪封堵器局部应变低于组织多普勒显像,且有5例患者封堵器局部应变为0,而组织多普勒法未见封堵器局部应变为0(χ2=5.33,P=0.027)。结论斑点追踪显像评价心房形变能力优于组织多普勒应变显像。
Objective To compare the value of speckle-tracking imaging and tissue Doppler strain imaging in evaluating left atrial （LA） mechanical contraction. Methods Forty patients after successful percutaneous atrial septal defect （ASD） closure were enrolled in this study. Two-dimensional strain imaging （2D strain echocardiography,2DSE） and tissue Doppler imaging （TDI） were performed one weak after ASD closure. Off-line analysis was done for atrial longitudinal peak systolic strain on the interatrial septum,in correspondence of the device,and on the lateral wall of the left atrium from apical 4 chamber view with 2DSE and color-coded strain imaging,respectively. Results There was no statistical difference of the inter-and intra-observer viability as well as time consumption on the off-line analysis between 2DSE and TDI. LA lateral wall strain was much higher than that of LA septum assessed by both color-coded strain imaging （47.31%±27.25% vs 30.06%±14.29%,P〈0.01） and 2DSE （43.49%±25.55% vs 12.74%±9.16%,P〈0.001）. LA lateral wall strain was similar with either method （P=NS）. However,at the site of ASD occluder,a non-contractile element,deformation was significantly higher in color-coded strain imaging than 2DSE （P〈0.001）. Five patients （12.50%） presented absence of deformation on ASD occluder with 2DSE,whereas there was no patient with TDI assessment （χ^2=5.33,P=0.027）. Conclusion Speckle-tracking imaging is superior to tissue Doppler strain imaging in assessing left atrium mechanical function.
出处
《中国医学影像技术》
CSCD
北大核心
2010年第4期659-661,共3页
Chinese Journal of Medical Imaging Technology
基金
北京市科技新星计划项目(2006B47)
