Fetal myocardial thickening measured by ultrasonic-based technique called 'phased-tracking method'
Fetal myocardial thickening measured by ultrasonic-based technique called 'phased-tracking method'
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DOI：
10.1159/000093889
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发表时间：
2006-01-01
影响因子：
2.2
通讯作者：
Okamura, Kunihiro
中科院分区：
文献类型：
--
作者：
Kunii, Shutaro;Sugawara, Junichi;Okamura, Kunihiro
目的：应用超声新技术评价胎儿心肌运动。研究方法：我们分析了50例孕25 ~ 41周的正常胎儿，采用相位跟踪法（一种具有高垂直距离分辨率和评价精细心室壁运动潜力的技术）检测胎儿心肌厚度的变化。我们分析了随着妊娠的进展，心室壁厚度的变化率以及内外壁层的变化率的差异。分析心肌增厚时间，并计算增厚时间与卒中间隔的比值。结果如下：右室壁平均厚度变化率（1.18 ± 0.34 m/s/m）显著高于左室壁（0.86 ± 0.31 m/s/m）（P < 0.001）。右心室心肌厚度增加期与每搏间期的平均比值（0.57 ± 0.064）显著高于左心室（0.46 ± 0.075）（p < 0.001），表明胎儿右心室心肌收缩占主导地位。双侧心室壁厚度变化率与胎龄呈直线正相关.妊娠晚期心肌壁厚度变化率外层高于内层。结论：因此，应用相位跟踪法测量胎儿心室壁厚度变化率可用于评价胎儿心功能。版权所有（c）2006 S. Karger AG，巴塞尔。
Objective: To evaluate fetal myocardial movement by using newly developed ultrasonic technique. Methods: We analyzed 50 normal fetuses between 25 and 41 weeks' gestation for changes in thickness of fetal myocardium using the phased-tracking method, a technique with high vertical distance resolution and the potential to evaluate fine ventricular wall movements. We analyzed differences in the rate of change in ventricular wall thickness and in changes in the inner and outerwall layers with advancing gestation. We also analyzed myocardial thickening period and evaluated the ratio of increasing thickness period to stroke interval. Results: Mean thickness changing rate was significantly higher in the right (1.18 0.34m/s/m) than in the left ventricular wall (0.86 0.31 m/s/m) (p < 0.001). Mean ratio of increasing thickness period to stroke interval was significantly higher in the right (0.57 +/- 0.064) than in the left ventricle (0.46 +/- 0.075) (p < 0.001), indicating that myocardial contraction in the fetal right ventricle predominates. The thickness- changing rate of the bilateral ventricular walls was positively and linearly correlated with gestational age. The myocardial-wall thickness-changing rate was higher in the outer layer than in the inner layer in late gestation. Conclusions: We conclude that measurement of the thickness-changing rate of fetal ventricular walls using the phased-tracking method might be useful for evaluation of fetal cardiac function. Copyright (c) 2006 S. Karger AG, Basel.