64层螺旋CT在冠状动脉旁路血管移植术前评价及术后随访中的临床应用

Clinical Application of 64-slice CT in Evaluation of Vessel Before and After Coronary Artery Bypass Graft Surgery

探讨64层螺旋CT冠状动脉成像在冠状动脉旁路血管移植术前评价及术后随访中的临床应用价值。收集2006年7月-2007年5月在我院因拟行冠状动脉旁路血管移植术而行64层螺旋CT冠状动脉成像检查的46例患者的影像资料，以及同期内行冠状动脉旁路血管移植术后进行随访的14例患者共39支旁路血管的影像资料，评估64层螺旋CT在冠状动脉旁路血管移植术前评价及术后随访准确性。结果发现，64层螺旋CT在冠状动脉旁路血管移植术前评估狭窄（≥50％）的敏感度、特异度、准确度分别为92．11％、95．64％和94．97％；评价旁路血管通畅35支（35／39，89．74％），旁路移植血管轻度狭窄4例（4／39，10．26％），无中重度狭窄。因此，利用64层螺旋CT可以准确的评价冠状动脉旁路血管移植术前及术后管腔的情况。

To determine the clinical value of 64-slice computed tomography angiography （CTA） in the evaluation of vessel before and after coronary artery bypass graft （CABG） surgery, we retrospectively collected the coronary artery imaging data of 46 patients undergoing 64 slice CT before CABG surgery in the period from July 2006 to May 2007, and we evaluated 14 patients with 39 coronary grafts in the same period to determine the diagnostic accuracy of CTA before and after CABG surgery. In 46 patients, 64-slice CT enabled the visualization of the entire coronary tree with diagnostic image quality. Sensitivity, specificity, and accuracy for the detection of stenosis≥ 50% were 92.11% ,95. 64% ,94. 97% , respectively. In 14 patients with 39 coronary grafts, 35（35/39,89.74%）bypass grafts were found to be of no stenosis;low degree of restenosis was found in 4（4/39,10.26%）bypass grafts,and no graft was found to have high degree of restenosis. So we concluded that, with the use of 64-slice CTA, we can accurately evaluate the degree of stenosis of vessel before and after CABG surgery.