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Objective To study the role of CTA and predicting factors of significant stenosis of native coronary arteries (SSNCA) in patients after coronary stent implantation.Methods From September 2010 to January 2012,123 patients (age 36 to 79 years,mean 56.99,106 males) with coronary stenting were enrolled.Clinical and laboratory data,640-slice coronary CTA and conventional coronary arteriography (CCA) were retrospectively reviewed and analyzed.All CCA were done within 1 day after coronary CTA.