Kahl F R, Wolfman N T, Watts L E
Am J Cardiol. 1981 Aug;48(2):304-10. doi: 10.1016/0002-9149(81)90611-1.
The efficacy of contrast-enhanced computed tomography to define graft patency status was studied in 42 patients with 100 aortocoronary vein grafts. The status of each graft had been determined earlier by angiography. A rotary fan beam whole body scanner with a 2 second scan duration was used. Initial scans determined the optimal level for study of the graft; patency was assessed by computed tomographic enhancement of the graft after intravenous bolus injection of 30 ml meglumine and sodium diatriazoate. The computed tomographic studies were evaluated without knowledge of the angiographic findings; graft status by computed tomography was interpreted as patent, occluded or equivocal. Overall, computed tomography correctly defined graft patency status in 79 of the 100 grafts and incorrectly identified it in 9; in 12 grafts, the computed tomographic diagnosis was equivocal. Computed tomography correctly identified 61 of 74 patent grafts and 18 of 26 occluded grafts. Patency status was correctly defined by computed tomography in 35 of 37 grafts to the left anterior descending artery, 23 of 30 grafts to circumflex branches and 19 of 31 grafts to the right coronary artery. These data indicate that computed tomography is a promising noninvasive method of determining patency of aortocoronary bypass grafts, especially of grafts to the left anterior descending artery.
在42例患者的100条主动脉冠状动脉静脉移植血管中，研究了对比增强计算机断层扫描（CT）确定移植血管通畅状态的效能。每条移植血管的状态此前已通过血管造影确定。使用了扫描时间为2秒的旋转扇束全身扫描仪。初始扫描确定了研究移植血管的最佳层面；在静脉推注30ml泛影葡胺和泛影酸钠后，通过移植血管的CT增强来评估通畅情况。CT研究在不了解血管造影结果的情况下进行评估；CT显示的移植血管状态被解释为通畅、闭塞或不明确。总体而言，CT在100条移植血管中正确确定了79条的通畅状态，9条判断错误；12条移植血管的CT诊断不明确。CT正确识别了74条通畅移植血管中的61条和26条闭塞移植血管中的18条。在37条左前降支移植血管中，CT正确确定了35条的通畅状态；在30条旋支移植血管中，正确确定了23条；在31条右冠状动脉移植血管中，正确确定了19条。这些数据表明，CT是一种很有前景的非侵入性方法，可用于确定主动脉冠状动脉旁路移植血管的通畅情况，尤其是左前降支移植血管。
