White R D, Caputo G R, Mark A S, Modin G W, Higgins C B
Radiology. 1987 Sep;164(3):681-6. doi: 10.1148/radiology.164.3.3497409.
A noninvasive means of determining coronary artery bypass graft (CABG) patency in symptomatic patients would be an important clinical asset. The accuracy of magnetic resonance (MR) imaging was evaluated for this purpose. Multiphasic electrocardiographically gated MR imaging examinations were performed in 25 patients with a total of 72 grafts. Transverse images of the heart at ten anatomic levels were obtained at five or six phases of the cardiac cycle. The MR images were read blindly to determine CABG patency versus occlusion, and these results were compared with those of coronary angiography performed within 2 months before the MR imaging. MR imaging correctly disclosed 43 patent grafts and 13 occluded grafts (predictive accuracy, 78%). Patency and occlusion were incorrectly diagnosed from MR imaging findings in five and four CABGs, respectively. CABG status could not be determined in seven (10%) grafts because the grafts were visualized at only one anatomic level. Thus, the accuracy of a definitive MR imaging evaluation was 91% (43 of 47 grafts) for patency determination and 72% (13 of 18 grafts) for occlusion determination. MR imaging appears to be a useful method for the noninvasive evaluation of CABGs.
对于有症状的患者而言，一种用于确定冠状动脉旁路移植术（CABG）通畅情况的非侵入性方法将是一项重要的临床资产。为此，对磁共振（MR）成像的准确性进行了评估。对25例患者共72条移植血管进行了多期心电图门控MR成像检查。在心动周期的五或六个阶段，获取了心脏十个解剖层面的横向图像。对MR图像进行盲法解读以确定CABG通畅与闭塞情况，并将这些结果与MR成像前2个月内进行的冠状动脉造影结果进行比较。MR成像正确地揭示了43条通畅的移植血管和13条闭塞的移植血管（预测准确率为78%）。分别有5条和4条CABG的通畅和闭塞情况根据MR成像结果被误诊。7条（10%）移植血管无法确定CABG状态，因为这些移植血管仅在一个解剖层面可见。因此，对于通畅情况的确定，确定性MR成像评估的准确率为91%（47条移植血管中的43条），对于闭塞情况的确定为72%（18条移植血管中的13条）。MR成像似乎是一种用于CABG非侵入性评估的有用方法。
