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目的运用双源CT冠状动脉成像探讨冠状动脉支架植入术后支架通畅性的特征。方法收集2009年7月至2010年10月在四川大学华西医院行双源CT冠状动脉成像检查的冠状动脉支架植入术后73例患者的影像资料,排除植入支架信息不明、行冠状动脉旁路移植术(CABG)后以及屏气不佳严重影响图象质量者;最后60例冠状动脉支架植入术后患者的双源CT冠状动脉成像纳入研究,其中男52例,女8例;平均年龄66岁;共植入支架109枚,支架植入时间6个月～3年。评估60例患者的双源CT冠状动脉成像图象质量,观察支架的解剖分布,并对支架植入术后再狭窄患者的图象进行观察分析。结果 60例患者图象质量全部满足诊断要求,植入的109枚支架均可评价,支架的优势解剖分布为左冠状动脉前降支和右冠状动脉。本组有101枚(92.66%)支架无再狭窄,8枚(7.34%)支架再狭窄(狭窄程度≥50%),其中3枚(2.75%)表现为支架内沿支架贴壁走行的低密度充盈缺损,另5枚(4.59%)支架表现为边缘型再狭窄。支架断面图象显示支架再狭窄最佳。结论双源CT冠状动脉成像可对冠状动脉支架植入术后通畅性进行直观评价。
Objective To evaluate the characteristics of stent patency after coronary stent implantation by dual-source CT coronary angiography. Methods The data of 73 patients after coronary stent implantation at the West China Hospital of Sichuan University from July 2009 to October 2010 were collected. The exclusion of implantable scaffolds was unknown. Coronary artery After CABG and poor breath-holding, the image quality was seriously affected. In the last 60 patients undergoing coronary stent implantation, dual-source CT coronary angiography was included in this study, including 52 males and 8 females; mean age 66 years old; a total of 109 stents were implanted, stent implantation time of 6 months to 3 years. The coronary angiography images of double-source CT in 60 patients were evaluated. The anatomic distribution of the scaffolds was observed. The images of patients with restenosis after stent-graft were observed and analyzed. Results The image quality of 60 patients all met the diagnostic criteria. All 109 scaffolds were evaluated. The dominant anatomic distribution of the scaffolds was the left anterior descending coronary artery and the right coronary artery. There were 101 (92.66%) stents without restenosis and 8 (7.34%) stents with stenosis≥50%. Three of them (2.75%) showed low density Filling defects, the other five (4.59%) stent showed marginal restenosis. Stent cross-sectional images showed the best stent restenosis. Conclusion Dual-source CT coronary angiography can evaluate the patency of coronary stenting.