Acar P, Marx G R, Saliba Z, Sidi D, Kachaner J
Services de Cardiologie Pédiatrique, H pital Necker/Enfants-malades, Paris, France.
Pediatr Cardiol. 2001 Mar-Apr;22(2):116-20. doi: 10.1007/s002460010173.
Three-dimensional echocardiography (3DE) allows calculation of ventricular volumes without geometric assumption on the ventricular shape. Our aim was to apply 3DE in a normal pediatric population and to compare the left ventricular stroke volume measurements to the Doppler method. Twenty-four normal patients (median age 7 years) underwent Doppler echocardiography and 3DE for left ventricular stroke volume calculation. The left ventricular stroke volume by Doppler method was calculated as the product of the aortic Doppler flow mean velocity and the area of the aortic annulus. The 3DE method was performed using a transthoracic rotational probe (TomTec) and left ventricular volumes were calculated using the Simpson's rule. The mean time for 3DE acquisition was 90 seconds without any sedation. 3DE correlated well with the Doppler method for left ventricular stroke volume measurements (y = 0.8x - 0.2, r = 0.94). The mean difference between the average values of left ventricular stroke volume obtained by Doppler method and 3DE was 5 +/- 4 ml. Intraobserver and interobserver variabilities in the left ventricular stroke volume measurement by 3DE were 2.6% and 4.4%. In conclusion, 3DE compared to the Doppler method is an accurate, noninvasive, and reproducible method to measure the left ventricular stroke volume in normal children.
三维超声心动图（3DE）可在不依赖心室形状几何假设的情况下计算心室容积。我们的目的是将3DE应用于正常儿童群体，并将左心室每搏量测量结果与多普勒方法进行比较。24名正常患者（中位年龄7岁）接受了多普勒超声心动图检查和3DE检查以计算左心室每搏量。多普勒方法计算的左心室每搏量为主动脉多普勒血流平均速度与主动脉瓣环面积的乘积。3DE方法使用经胸旋转探头（TomTec）进行，左心室容积采用辛普森法则计算。3DE采集的平均时间为90秒，无需任何镇静。在左心室每搏量测量方面，3DE与多普勒方法具有良好的相关性（y = 0.8x - 0.2，r = 0.94）。多普勒方法和3DE获得的左心室每搏量平均值之间的平均差异为5±4 ml。3DE测量左心室每搏量的观察者内和观察者间变异分别为2.6%和4.4%。总之，与多普勒方法相比，3DE是一种准确、无创且可重复的测量正常儿童左心室每搏量的方法。
