定量组织多普勒速度图评价正常胎儿心室壁及其整体运动

目的探讨超声定量组织多普勒速度成像技术（QTVI）评价正常胎儿心室壁运动的临床价值。方法运用彩色组织多普勒速度成像图对30例孕27-40周正常胎儿心脏进行检测，在心尖四腔图切面，对左右心室壁及室间隔的9个观察点的速度曲线进行分析，测量收缩期运动速度Vs，舒张早期运动速度Ve，舒张晚期运动速度Va，并进行分析和统计学处理。结果正常胎儿心室壁运动速度的变化趋势为基底部〉中部〉心尖部，左心室、间隔收缩期运动速度相近，右心室收缩期运动速度略高于左心室及间隔，在舒张晚期间隔与左心室的速度相近，但低于右心室。结论组织多普勒速度成像技术用于评价胎儿室壁运动是可行的，它安全、准确、可靠。

Quantitative Tissue Velocity Imaging of Ventricular Wall Motion in Normal Fetuses

Objective To assess the feasibility of quantitative tissue velocity imaging(QTVI) evaluation in the fetus and to assess myocardial velocities and myocardial velocity gradient.Methods Thirty normal fetuses between the 20th and 40th gestation week were studied.From apical four-chamber view,peak velocities were measured within the basal,mid and apical parts of the interventricular septum,and left and right free ventricular wall.The Pv velocities included peak sustained systolic velocity(Vs),peak early diastolic(Ve) and peak late diastolic velocity(Va).Results The higest PVs were obtained within the basal parts of all myocardial walls.The peak velocities within mid parts were higher than those within apical parts,and a positive correlation was present along with the advancing gestational ages.Vs of the left ventricle(LV) and interventricular septum(IVS) had no difference and was lower than that of the right ventricle(RV).Va of LV and IVS had no difference and was lower than that of RV.Conclusions QTVI evaluation of the fetal heart is feasible and reproducible and is a new method for assessing the fetal cardiac function.