先天性主动脉缩窄的MRI诊断

Diagnosis of Coarctation of the Aorta by MR Imaging Compared with Diagnosis by UCG and CAG

目的：评价ＭＲＩ在先天性主动脉缩窄中的诊断作用。材料与方法：分析１４例主动脉缩窄的ＭＲＩ，并与超声心动图（ＵＣＧ）和心血管造影（ＣＡＧ）进行比较，其中１２例经手术证实。结果：ＭＲＩ显示了１４例主动脉缩窄及缩窄的程度、形态（细管状狭窄６例，环状狭窄５例，隔膜形狭窄３例），并显示了缩窄处与左锁骨下动脉的关系。合并畸形有：１０例室间隔缺损，１３例动脉导管未闭，１例马凡氏综合征，１０例主动脉弓发育不良。比较三种影像方法：ＭＲＩ诊断能力明显优于ＵＣＧ，基本达到ＣＡＧ水平。结论：在先天性主动脉缩窄的临床诊断中，ＭＲＩ应成为主要或首选检查方法。

Purpose:To thoroughly evaluate the clinical efficacy of MRI in diagnosis of congenital coarctation of the aorta. Materials and methods: 14 cases MRI of coarctation of the aorta were analysed and compared with echocardiography (UCG) and cardioangiography (CAG), and in which 12 cases were confirmed by operation. Results: Utilizing MRI, it was possible to acqiure the following information concering coarctation of the aorta: the length and the severity of the lesion; the shape of coarctation including tubular shape (6 cases); hourglass shape (5 cases), and membranous shape (3 cases); the relationship of the site of coarction to the left subclavian artery. The associated anomolies included: Ventricular septal defect (10 cases), patent ductus arterious (13 cases), hypoplastic aortic arch (10 cases), and Marfan's syndrome (1 case). It was found that the diagnostic utility of MRI was superior to that of UCG and approched that of CAG. Conclusion: MRI should be a important or/and initial method of examination and might partly displace CAG as the final method used in the diagnosis of coarctation of the aorta.