This study was performed to evaluate clinical and angiographic restenosis rates after successful Cordis coronary stent implantation and intravascular ultrasound images were acquired to compare results with quantitative angiographic findings in a subgroup of patients. We conclude that (1) the angiographic restenosis rate of Cordis stent was 19%, which was comparable to that of other slotted-tube stents, and (2) the quantitative coronary angiographic calliper method is reliable for assessing Cordis in-stent restenosis, especially diffuse in-stent restenosis.