摘要
目的:应用超声心动图组织追踪法评价肥厚型心肌病(HCM)患者左室纵向运动功能。方法:获取标准心尖位左心长轴切面、二腔切面和四腔切面图像,应用组织追踪法离线分析30例HCM患者和20例健康志愿者左室各心肌节段位移曲线。结果:HCM组肥厚与非肥厚心肌节段的位移均降低,但二者之间差异无显著性意义;二者分别与对照组相比,绝大部分节段差异有显著性意义;HCM患者二尖瓣环、基底部、中部和远端每个水平的平均位移均较正常人显著降低。结论:HCM患者左室纵向运动功能受到损害,损害不仅发生在肥厚的左室壁,非肥厚的室壁同样受到损害,组织追踪法能够定量评价HCM患者左室纵向运动功能。
Objective:To assess the longitudinal displacement of the left ventricular segmental movements in patients with hypertrophic cardiomyopathy (HCM) using tissue tracking technology.Methods:20 healthy subjects and 30 patients with HCM were studied by tissue tracking technology.Off-line left ventricular displacement profiles along left ventricular apical long-axis view,apical two-chamber view and four-chamber view were obtained synchronously,and peak systolic displacements of each segment were measured.The mean peak displacement of different segments from the same level was calculated.Results:Displacements of all regional myocardial segments along long-axis in the HCM patients were significantly lower than those in the healthy subjects, but there was no significant difference in displacements of all regional myocardial segments along long-axis between hypertrophied and nonhypertrophied group in the HCM patients.The mean peak displacements were significantly lower at each level including mitral annular,basal,middle and apical segments in the HCM patients than those in the healthy subjects.Conclusions:The left ventricular segmental movement functions along long-axis is impaired not only in the hypertrophied wall but also in the nonhypertrophied one in patients with HCM,and these results suggest that tissue tracking can assess longitudinal movements of the left ventricular in patients with HCM.
出处
《放射学实践》
2005年第4期361-363,共3页
Radiologic Practice
关键词
肥厚型心肌病
左心室功能
组织追踪法
Hypertrophic cardiomyopathy
Left ventricular function
Tissue tracking
