The influence of stent material on coronary stent CTA

LIU Jianping; GAO Mingyong; HUANG Meiping; LIU Hui; LIU Zaiyi; LIANG Changhong

Abstract：Objective To evaluate the influence of stent material on the coronary angiography with 64-MSCT.Methods Cor-onary artery CTA images of 60 patients with coronary artery implanted stents were retrospectively analyzed.Stents of sixty patients were grouped into cobalt-chromium alloy group and stainless steel group based on stent material.We intended to investigate the in-fluence of stent material on the CTA and the diagnostic accuracy of CTA in detecting prominent ISR, as referring to Coronary ar-giography.Results Ninety-five stents, including 13 types of stents, were implanted in 60 patients.The accuracy, sensitivity, specificity, positive predictive, negative predictive and Kappa value for CTA diagnosis of prominent ISR were 74.3%, 81.4%, 76.5%, 79.5%and 0.558 respectively.In comparison to stainless steel stents, cobalt-chromium alloy stents seens less artifacts, and the rate of available evaluation (86.7%vs 77.5%, P =0.002) and the accuracy of diagnosis (94.7% vs 71.2%, P =0.034) were bigger.Conclusion As compared with stainless steel stents, cobalt-chromium alloy stents show less artifactsr, which may be a material of an ideal for Coronary Artery Stent in CTA examination.We should pay attention that the ISR may be overevaluated in stainless steel stents with more artifacts on CTA.