Initial experience with the Cordis stent: analysis of serial angiographic follow-up

To evaluate the efficacy of the more flexible Cordis stent, a prospective angiographic follow-up study was performed. Implantation of the Cordis stent was attempted in 99 consecutive patients with 103 native coronary lesions from January 1994 to July 1995. Clinical success, defined as final diameter stenosis of < 50% without death, bypass surgery, or Q-wave myocardial infarction, was achieved in 88% of the patients. There were no in-hospital deaths. In-hospital subacute stent occlusion occurred in only one case. Follow-up angiograms were obtained in 86 (95%) eligible lesions. The minimal luminal diameter improved from 1.03 +/- 0.31 to 2.82 +/- 0.31 mm, but started to decrease at 1 mon (2.57 +/- 0.24 mm), and continued to decrease throughout the 6 mon (2.00 +/- 0.61 mm), the biggest reduction being between 1 and 3 mon (-0.57 +/- 0.50 mm). Angiographic restenosis (stenosis > or = 50%) occurred in 23% of the lesions; a revascularization procedure of the target lesion was required in 12% of the patients. Multivariate analysis identified age, diabetes mellitus, and preprocedural reference diameter to be predictors of angiographic restenosis. In conclusion, the Cordis stent can be implanted successfully with a low complication rate and a clinical outcome at least comparable to other stent studies.