Observation of recent and long-term effects of Radius stent by intravascular ultrasound

Objective To investigate the recent and long term effects of Radius stent through intravascular ultrasound(IVUS).Methods The study consisted of 147 coronary disease patients who had implanted self expanding Radius stent in chosen time.Coronary artery angiography and IVUS were performed to evaluate the clinical outcomes of Radius stent before and after the implantation.All the patients were followed up six months approximately after the implantation.Results The implantation success rate and clinical success rate of Radius stent were 99.5% and 98.9% respectively, restenosis rate was 10.8% at follow up examination for 6.4 months.The IVUS measurements showed that the lumen area was extended from 2.7 mm 2 to 5.3 mm 2 after the implantation and stent area was 7.6 mm 2 after about 6.4 months,but since intimal hyperplasia area was 2.6 mm 2,real lumen area was 5.0 mm 2 at follow up, which was a little smaller than that of the stent implantation at once.Conclusions IVUS showed a lower occurrence of restenosis for Radius stent,which is of value to its clinical application.