Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.
Fetal Diagnostic Centers, Pasadena, Tarzana, and Lancaster, California, USA.
J Ultrasound Med. 2019 Apr;38(4):1039-1047. doi: 10.1002/jum.14792. Epub 2018 Oct 2.
This study was conducted to evaluate the 24-segment transverse widths of the right and left ventricles distributed from the base to the apex of the ventricular chambers and compute the right ventricular (RV)/left ventricular (LV) ratios for each segment.
Two hundred control fetuses were examined between 20 and 40 weeks' gestation. Using offline speckle-tracking software, the 24 end-diastolic transverse widths were computed and the RV/LV ratios were regressed against 7 independent variables related to the size, weight, and age of the fetuses. Five fetuses with coarctation of the aorta and 5 fetuses with pulmonary stenosis were examined to exemplify the utility of these measurements.
The 24-segment transverse widths were associated with changes in fetal size, weight, and age. Regression equations were developed to describe these changes with R values between .5 and .82. The measurements were normally distributed (Shapiro-Wilk > 0.5). The RV/LV ratio for the 24 segments did not strongly correlate (R = .001 to -.2) with fetal size, weight, or gestational age. Fetuses with coarctation of the aorta and pulmonary stenosis demonstrated characteristic changes in the 24-segment transverse widths and the RV/LV ratios in the basal (segments 1-8), mid (segments 9-16) and apical (segments 17-24) sections of the ventricles.
The 24-segment transverse widths of the right and left ventricles and the RV/LV ratios provide a comprehensive method to examine the width of the ventricular chambers.
本研究旨在评估心室基底至心尖部的右、左心室 24 节段的横径，并计算各节段的右心室（RV）/左心室（LV）比值。
在 20 至 40 孕周之间，对 200 例正常胎儿进行检查。使用脱机斑点追踪软件，计算 24 个舒张末期的横径，并将 RV/LV 比值与 7 个与胎儿大小、体重和年龄相关的独立变量进行回归。对 5 例主动脉缩窄和 5 例肺动脉瓣狭窄的胎儿进行检查，以举例说明这些测量的应用。
24 节段的横径与胎儿大小、体重和年龄的变化相关。建立了回归方程来描述这些变化，R 值在.5 至.82 之间。这些测量值呈正态分布（Shapiro-Wilk>0.5）。24 节段的 RV/LV 比值与胎儿大小、体重或胎龄的相关性不强（R 值为 0.001 至-0.2）。主动脉缩窄和肺动脉瓣狭窄的胎儿在心室基底（节段 1-8）、中部（节段 9-16）和心尖（节段 17-24）节段的 24 节段横径和 RV/LV 比值上表现出特征性变化。
右、左心室的 24 节段横径和 RV/LV 比值为检查心室腔宽度提供了一种全面的方法。
