Usefulness of Z-score of early diastolic velocities using tissue Doppler imaging in evaluating left ventricular diastolic function in children with dilated cardiomyopathy

VernacularTitle:二尖瓣环舒张早期速度Z值评估扩张型心肌病患儿左心室舒张功能的价值
Author: Limiao XIAO ¹ ; Wenjuan CHEN ; Yuan HU
Author Information

1. 湖南省儿童医院超声科
Keywords: Echocardiography; Dilated cardiomyopathy; Children; Ventricular diastolic function; left; Tissue Doppler imaging
From: Chinese Journal of Ultrasonography 2019;28(1):27-30
CountryChina
Language:Chinese
Abstract: Objective To evaluate the impact of Z-score of early diastolic velocities using tissue Doppler imaging(TDI) in children with dilated cardiomyopathy(DCM) . Methods Fifty-eight children with DCM and 58 healthy children (control group) were selected ,tissue Doppler velocities were converted to Z-score on the basis of body-surface-area-adjusted . The Z-score head-to-head with the raw velocities were compared.Results ①Lateralwalle'velocitiesandinterventricularseptale'velocitieswerepositively correlated with age ( r = 0 .710 ,0 .622;all P < 0 .05 ) . Tissue Doppler velocities and Z-score of mitral annular in DCM children were lower than the normal children( P <0 .001) . ② The discriminant capacity was higher for the Z-score than for the e'raw velocities ,which were assessed by the area under the receiver operating characteristic curves . Conclusions The Z-score of early diastolic velocities are better than the raw velocities in evaluating left ventricular diastolic function in children with dilated cardiomyopathy