Godart F, Beregi J P, Rey C, Louvegny S, Desmoucelles F, Nicol L, Vaksmann G, Brevière G M, Francart C
Service des maladies cardiovasculaires infantiles et congénitales, Hôpital cardiologique, Lille.
Arch Mal Coeur Vaiss. 1998 May;91(5):587-92.
The results of magnetic resonance imaging (MRI) in the investigation of coarctation of the aorta were assessed and compared with those of cardiac catheterisation. This was a retrospective study of a series of 24 patients aged 14 +/- 4 years with a coarctation treated and documented by MRI. The investigation was performed with a high field 1.5 tesla (Vision, Siemens) system. Twenty-one children underwent comparative retrograde cardiac catheterisation with angiography and measurement of the peak-to-peak pressure gradient across the isthmus. No significant difference in the measurements of the aorta in MRI spin echo, gradient echo and retrograde aortic angiography were observed. On the other hand, there was a slight correlation between the degree of stenosis measured by MRI and the peak-to-peak haemodynamic gradient (r = 0.40). Seven patients had a loss of signal at the level of the aortic isthmus on MRI angiography which correlated with the haemodynamic gradient (p = 0.04). The authors conclude that MRI is a reliable non-invasive technique of investigating coarctations of the aorta. It gives accurate morphological data concerning the stenosis and blood flow. MRI should be part of the investigations of coarctation of the aorta, especially in poor indication to be able to correct it or consider the results of angioplasty or surgical correction.
对磁共振成像（MRI）在主动脉缩窄检查中的结果进行了评估，并与心导管检查结果进行了比较。这是一项对24例年龄为14±4岁的主动脉缩窄患者进行的回顾性研究，这些患者接受了MRI检查并记录在案。检查使用高场1.5特斯拉（Vision，西门子）系统进行。21名儿童接受了对比逆行心导管检查及血管造影，并测量了峡部两端的峰-峰压力梯度。在MRI自旋回波、梯度回波和逆行主动脉血管造影中，主动脉测量结果未观察到显著差异。另一方面，MRI测量的狭窄程度与峰-峰血流动力学梯度之间存在轻微相关性（r = 0.40）。7例患者在MRI血管造影中主动脉峡部水平出现信号缺失，这与血流动力学梯度相关（p = 0.04）。作者得出结论，MRI是一种可靠的无创性主动脉缩窄检查技术。它能提供有关狭窄和血流的准确形态学数据。MRI应成为主动脉缩窄检查的一部分，尤其是在纠正指征不佳或考虑血管成形术或手术矫正结果的情况下。
