64层螺旋CT冠状动脉成像在冠状动脉支架置入术前评价及术后随访中的临床应用

Clinical Application of 64-slice CT Angiography in the Evaluation of Lumen Before and After Coronary Artery Stent Implantation

探讨64层螺旋CT冠状动脉成像在冠状动脉支架置入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支架置入术而接受64层螺旋CT冠状动脉成像检查的46例患者的影像资料，以及同期内冠状动脉支架置入术后进行随访的21例患者共34个支架的影像资料，评估CT冠状动脉成像在冠状动脉支架置入术前评价及术后随访中诊断价值。结果发现64层螺旋CT对冠状动脉支架置入术前评估狭窄≥50％的敏感度、特异度、准确度分别为92．11％、95．64％和94．97％。64层螺旋CT评价支架通畅23个（67．65％），支架轻度狭窄8例（23．53％），重度狭窄3例（8．83％）。因此，利用64层螺旋CT可以准确的评价冠状动脉支架置入术前及术后管腔的情况。

This is a retrospective study aimed at the clinical application of 64-slice mmputed tomography angiography （CTA） in evaluation the lumen before and after coronary artery stent implantation. We collected the coronary artery imaging data of 46 patients undergoing 64-slice CT before coronary artery stent implantation from July 2006 through May 2007; we also collected the data of 21 patients with 34 coronary artery stents in the same period to determine the diagnostic accuracy of CTA before and after coronary artery stent implantation. The results showed that, 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% and 94.97%, respectively. In 21 patients with 34 stents implanted, 23（67.65% ）stents showed no stenosis, 8（23.53% ）stents showed low degree of restenosis, and 3 （8.83% ） stents showed high degree of restenosis. In eonclusion, we can accurately evaluate the degree of stenosis of lumen before and after coronary artery stent implantation with the application of 64-slice CTA.