应用速度向量成像技术对川崎病儿童左心收缩功能的评价

目的探讨应用速度向量成像技术对川崎病儿童左心长轴方向收缩功能的价值。方法对24例急性期川崎病患儿(冠脉扩张8例)、27例恢复期川崎病患儿(冠脉扩张9例)与20例正常儿童进行超声心动图检查。于胸骨旁左室长轴切面测量各腔室径线;通过M型超声获得左室射血分数(EF);采集心尖四腔三个完整心动周期的动态图像,存入光盘中。应用VVI技术脱机分析室壁基底部、中间部、心尖段的收缩期峰值速度(Vmax)、应变(Smax)、应变率(SR-max)。结果急性期组收缩期峰值速度(Vmax)、收缩期峰值应变率(SRmax)低于正常组,在所有基底部和部分中间及心尖节段有统计学差异(P<0.05);恢复期组与正常组比较部分节段差异有统计学意义;恢复期组儿童同一室壁收缩期峰值应变率(SRmax)失去一致性。结论急性期和恢复期川崎病儿童均有不同程度的左室长轴方向收缩功能受损。

Assessment of left ventricular systolic function in children with acute Kawasaki disease by velocity vector imaging

Objective To assess the left ventricular(LV) function in children with acute Kawasaki disease(KD) through velocity vector imaging.Methods 24 children with acute KD(including 8 cases with coronary distension) and 27 recovering children with KD(including 9 cases with coronary distension) and 20 normal cases were studied by the ultrasonography.The left ventricular ejection fraction was measured by M2mode echocardiography.The diameters of all ventricles were measured from the axial section of left ventricular by the bosom bone.Three dynamic and complete LV velocity profiles were stored in the CD-ROM.With VVI technology,the off-line analyses about Vmax,Smax and SRmax of the bottom,middle and top parts of the heart will be committed.Results Vmax and SRmax of the acute group were lower than those in the normal group(P<0.05).The differences in some segments between the recovering group and the normal group had statistical meaning.The SRmax of the recovering group lost its coherence.Conclusion The left ventricular longitudinal systolic functions of the children in acute and recovering period are impaired.