斑点追踪成像评价肥厚型心肌病病人左心室心肌收缩功能

目的应用斑点追踪成像（STI）技术评价肥厚型心肌病（HCM）病人的左心室整体和局部心肌收缩功能。方法选取室间隔中上段肥厚的HCM病人40例（HCM组）和健康对照者40例（对照组），测量并比较两组左心室各节段的纵向收缩期峰值应变、整体峰值纵向应变（GLPS）及其应变率（GLSRs）、达峰时间。结果与对照组相比，HCM组左心室各节段纵向收缩期峰值应变减低（t=2．00～9．32，P〈0．05），左心室GLPS和GLSRs也减低（t=17．75、4．23，P〈0．05）。结论STI能够准确评价HCM病人左心室心肌收缩功能。

ASSESSMENT OF LEFT VENTRICULAR SYSTOLIC FUNCTION IN HYPERTROPHIC CARDIOMYOPATHY USING SPECKLE TRACKING IMAGING

Objective To assess segmental and global left ventricular contraction function of patients with hypertrophic cardiomyopathy （HCM） using speckle tracking imaging （STI）. Methods Forty HCM patients with upper interventricular sep- turn hypertrophy were selected as HCM group, and 40 healthy persons served as controls （control group）. Left ventricular longitu- dinal peak systolic strain, global peak systolic longitudinal strain, its strain rate and the time reaching the peak in the two groups were measured and compared. Results Compared with the control group, the patients in the HCM group had a lower regional left ventricular longitudinal peak systolic strain （t =2.00-9.32,P〈0.05）, the global peak systolic longitudinal strain （t=17.75, P〈0.05）, and the global peak systolic longitudinal strain rate （t =4.23,P〈0.05）. Conclusion Speckle tracking imaging can accurately assess the left ventricular systolic function in patients with hypertrophic cardiomyopathy.