Wintersperger B J, von Smekal A, Engelmann M G, Knez A, Penzkofer H V, Laub G, Reiser M
Institut für Radiologische Diagnostik, Klinikum Grosshadern, Ludwig-Maximilians-Universität München.
Rofo. 1997 Dec;167(6):572-8. doi: 10.1055/s-2007-1015585.
Assessment of graft patency with current non-invasive MRA techniques is particularly difficult for evaluating internal mammary artery grafts. Our aim is to determine the accuracy of a contrast enhanced MRA technique is assessing graft patency.
We examined 19 patients with a total of 53 grafts (32 venous/21 arterial), using an ultrafast contrast enhanced 3D gradient-echo technique and compared this with the results of selective angiography.
Sensitivity of the contrast enhanced method was 95.2% for venous grafts, 94.4% for IMA grafts and 94.8% overall. Specificity was 85.7% overall, 90.9% for venous and 66.7% for IMA grafts. Positive predictive value was 94.4%.
Compared with previous studies, visualisation of IMA grafts was improved by using contrast enhanced MRA. In this preliminary study, contrast enhanced MRA proved promising for the assessment of graft patency.
利用当前的非侵入性磁共振血管造影（MRA）技术评估移植血管通畅情况对于评估内乳动脉移植血管尤为困难。我们的目的是确定一种对比增强MRA技术在评估移植血管通畅情况方面的准确性。
我们使用超快对比增强三维梯度回波技术检查了19例患者，共53条移植血管（32条静脉/21条动脉），并将其与选择性血管造影结果进行比较。
对比增强法对静脉移植血管的敏感性为95.2%，对内乳动脉移植血管的敏感性为94.4%，总体敏感性为94.8%。总体特异性为85.7%，静脉移植血管为90.9%，内乳动脉移植血管为66.7%。阳性预测值为94.4%。
与先前的研究相比，使用对比增强MRA改善了内乳动脉移植血管的可视化。在这项初步研究中，对比增强MRA在评估移植血管通畅情况方面被证明很有前景。
