斑点追踪成像对心尖肥厚型心肌病左室收缩功能评价

ASSESSMENT OF LEFT VENTRICULAR SYSTOLIC FUNCTION IN APEX-HYPERTROPHIC CARDIOMYOPATHY BY SPECKLE TRACKING IMAGING

目的应用斑点追踪成像技术（STI）评价心尖肥厚型心肌病病人的左心室心肌整体和局部收缩功能。方法选取心尖肥厚型心肌病病人（ApHCM组）35例、健康对照者（正常对照组）40例,应用STI测量左心室各节段的纵向应变,以及整体心肌的纵向应变、应变率、达峰时间,并比较两组各参数的差异。结果与正常对照组比较,ApHCM组左心室各节段纵向应变减低（t=2.05~7.27,P〈0.05）,左心室整体纵向应变、应变率减低（t=8.81、3.52,P〈0.05）。两组达峰时间比较差异无显著性（P〉0.05）。结论 STI能够准确评价心尖肥厚型心肌病病人左心室心肌收缩功能。

Objective To assess segmental and global left ventricular function of patients with apex-hypertrophic cardio- myopathy （ApHCM） by speckle tracking （STI）. Methods Thirty-five patients with ApHCM were selected and served as ApHCM group, and 40 healthy people served as controls. Using STI, regional peak systolic axial strain, the global peak systolic longitudinal strain and its rate, and the peak time peak time were measured. The differences of the parameters between the two groups were compared. Results Compared with the control group, the segmental longitudinal strain in ApHCM group and glo- bal left ventricular longitudinal strain and strain rate decreased （t =2.05-8.81 ,P〈0.05）. The difference of peak time was not sig- nificant between the two groups （P〉0.05）. Conclusion Speckle tracking imaging can accurately evaluate the left ventricular systolic function in patients with apex-hypertrophic cardiomyopathy.