Background There is significant variation in response to antiplatelet therapy,associated with outcomes after coronary stent implantation.Hyporesponse to antiplatelet therapy predicts ischemia outcomes;however,overinhibition is associated with bleeding outcomes.We initiated the study to investigate the inhibition level of platelet function on the treatment of conventional dual antiplatelet drug in Chinese patients underwent coronary stent implantation with thrombelastography (TEG).