Areias J C, Goldberg S J, Spitaels S E, de Villeneuve V H
Am Heart J. 1978 Oct;96(4):467-74. doi: 10.1016/0002-8703(78)90157-6.
The aim of this study was to determine the accuracy of range gated pulsed Doppler (RGPD) echocardiography for detecting obstruction to the pulmonary outflow tract in children with d-transposition of the great vessels (d-TGV). Twenty-one children were randomly selected for those available with d-TGV and were studied by precordial and suprasternal RGPD echocardiography. Three were excluded, leaving a population of 18 subjects. The exclusive criterion used to judge the RGPD results was the output of the time interval histogram (TIH). Coherence of the TIH was considered to represent laminar flow. Dispersion of the TIH was considered evidence of flow disturbance and obstruction to the outflow tract. With the range gating feature, the first site of disturbance could be localized. Information was handled by a technique that decreased bias. RGPD results were then compared to diagnoses of the outflow tract established at cardiac catheterization or operation. Comparison of these results indicated that all seven children with obstruction were correctly identified by RGPD study, and the level of the first obstruction was correctly identified. With one exception, all children without pulmonary obstruction were correctly identified by the examination.
本研究的目的是确定距离选通脉冲多普勒（RGPD）超声心动图检测大动脉 d 型转位（d-TGV）患儿肺流出道梗阻的准确性。从患有 d-TGV 的患儿中随机选取 21 例，采用心前区和胸骨上窝 RGPD 超声心动图进行研究。排除 3 例，最终纳入 18 名受试者。用于判断 RGPD 结果的唯一标准是时间间隔直方图（TIH）的输出。TIH 的一致性被认为代表层流。TIH 的离散度被视为血流紊乱和流出道梗阻的证据。利用距离选通功能，可以定位第一个紊乱部位。信息通过一种减少偏差的技术进行处理。然后将 RGPD 结果与心脏导管检查或手术时确定的流出道诊断结果进行比较。这些结果的比较表明，RGPD 研究正确识别了所有 7 例有梗阻的患儿，并且正确识别了第一个梗阻的部位。除 1 例例外，所有无肺梗阻的患儿均通过检查被正确识别。
