AngiographiC Evaluation of the Everolimus-Eluting Stent in Chronic Total Occlusions - the ACE-CTO Study

Chronically total occlusions (CTO) are difficult to treat and have high risk for restenosis. Although everolimus-eluting stents (EES) \[(Xience, Abbott Vascular) or Promus (Boston Scientific)\] are very promising for the treatment of CTOs due to their low late loss and excellent deliverability, there are currently no published data on EES implantation in CTOs. The specific aim of this proposal is to examine the 8-month incidence of binary angiographic in-stent restenosis (defined as a stenosis of \> 50% of the minimum lumen diameter of the target stent) after implantation of the EES in CTO. It is the investigators hypothesis that EES-treated CTO lesions will have ≤ 20% 8-month in-stent binary angiographic restenosis rate.