Dahlbäck Charlotte, Gudmundsson Saemundur
Lund University, Department of Obstetrics and Gynecology, Skåne University Hospital, Malmö, Sweden.
Prenat Diagn. 2015 Jun;35(6):605-11. doi: 10.1002/pd.4580. Epub 2015 Apr 14.
Cardiac dysfunction has been shown in cases of placental insufficiency, but few reports exist on fetal atrial function. The aim of this study was to generate reference values for atrial strain and compare them to results in fetuses with signs of increased placental resistance and abnormal venous circulation.
Using a 2D speckle-tracking technique, velocity and strain of the fetal atrial walls were investigated in 250 healthy fetuses and in 40 fetuses with abnormal umbilical Doppler. Influences of gestational age, heart rate, and frame rate on the measurements were investigated and reference curves constructed.
Strain and velocity were greater for the right atrial walls compared with the left, and velocity and strain rate increased with gestational age. Increased pulsatility of the ductus venosus and umbilical vein was not associated with altered right atrial function.
2D speckle-tracking analysis of fetal atrial wall movement seems to be feasible. Atrial function was preserved in fetuses with placental dysfunction, even in cases of increased venous pulsatility.
胎盘功能不全的病例中已显示存在心脏功能障碍，但关于胎儿心房功能的报道很少。本研究的目的是生成心房应变的参考值，并将其与胎盘阻力增加和静脉循环异常迹象的胎儿的结果进行比较。
使用二维斑点追踪技术，对250例健康胎儿和40例脐动脉多普勒异常的胎儿的心房壁速度和应变进行研究。研究了胎龄、心率和帧率对测量的影响并构建了参考曲线。
右心房壁的应变和速度大于左心房壁，速度和应变率随胎龄增加。静脉导管和脐静脉搏动增加与右心房功能改变无关。
二维斑点追踪分析胎儿心房壁运动似乎是可行的。胎盘功能不全的胎儿即使在静脉搏动增加的情况下，心房功能也得以保留。
