title: Novel stent and delivery systems for the treatment of bifurcation lesions: porcine coronary artery model.
abstract: BACKGROUND
  In percutaneous treatment of bifurcation coronary lesions, side-branch restenosis remains a significant limitation in current therapeutic approaches. Coronary stents with a side aperture and a sleeve may be clinically advantageous to maintain access to side branch, stabilize the side-branch orifice, and deliver the appropriate drug to the side-branch ostium.
  
  
  METHODS
  A novel stent system (PETAL stent; Advanced Stent Technologies, Pleasanton, CA), incorporating a side aperture with deployable struts, was compared within porcine coronary model to the prior stent version having only the side aperture (SLK-View stent). In six pigs, each stent was implanted either in the left anterior descending coronary artery or the left circumflex coronary artery with adjunctive kissing balloon dilatation. At 28-day follow-up, coronary angiography was performed.
  
  
  RESULTS
  A total of six SLK-View stents and six PETAL stents were implanted in coronary arteries without any complication, and adjunctive kissing balloon dilatations were successful in all lesions. Quantitative coronary angiography (QCA) data at 28 days showed that PETAL stents exhibited superior QCA in mean diameter compared with SLK-View stents for side branch, inferring efficacy of PETAL ostial struts.
  
  
  CONCLUSIONS
  AST-PETAL stent has the potential to be a new solution for treatment of bifurcation lesions. Antirestenosis drug elution should be considered with this successful platform.
authors.affiliation: Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA 94304, USA. fikeno@cvmed.stanford.edu
authors.forename: Fumiaki
authors.initials: F
authors.lastname: Ikeno
authors.forename: Maurice
authors.initials: M
authors.lastname: Buchbinder
authors.forename: Alan C
authors.initials: AC
authors.lastname: Yeung
mesh_terms: D000818:Animals; D017023:Coronary Angiography; D023903:Coronary Restenosis / Q000188:drug therapy / Q000517:prevention & control* / Q000601:surgery; D003331:Coronary Vessels / Q000601:surgery*; D004195:Disease Models, Animal; D016503:Drug Delivery Systems; D015607:Stents; D034421:Sus scrofa