M-型彩色多普勒测量儿童舒张早期左室血流传播速度

Left Ventricular Flow Velocity Assessed by Colour M-mode Doppler in Children

目的 :探讨M_型彩色多普勒测量舒张早期左室血流传播速度评价儿童左室舒张功能的价值及正常儿童各年龄组的舒张早期左室血流传播速度值范围。方法 :对照组为120例正常儿童 ,观察组为18例扩张型心肌病患儿 ,分别测量舒张早期左室血流传播速度 (Vp)、E波峰值流速 (EV)、A波峰值流速 (AV)、E波压差半降时间(P1/2t)、E波斜率(Slope)。结果 :正常儿童舒张早期左室血流传播速度为 (36 74±6 06)cm/s ,扩张型心肌病患者的舒张早期左室血流传播速度为 (22 06±6 20)cm/s(E/A>1组 )、(21 87±7 80)cm/s(E/A<1组 ) ,后者明显低于正常儿童的最低值 (P<0.01)。结论 :应用M_型彩色多普勒测量舒张早期左室血流传播速度 ,在儿科心脏超声检查中能准确、简单、快速。

To evaluate the use of colur M_mode doppler echocardiography in assessing left ventricular diastolic function as a new noninvasive technique in children.Methods:Vp,EV,AV,P1/2t,and slope were measured by color M_mode doppler in 120 normal and 18 patients with dilated cardiomyopathy.Results:In normal subjects,the velocity of flow propagation was (36.74±6.06) cm/s.In dilated cardiomyopathy,the velocity was much lower than that in normal subjects.Conclusion:The velocity of left ventricular flow can be simply and accurately measured by M_mode color doppler in children.