title: A new transcatheter aortic valve and percutaneous valve delivery system.
abstract: OBJECTIVE
  We describe procedural and clinical outcomes in a high-risk cohort undergoing transcatheter aortic valve replacement with early next-generation transcatheter valve and delivery systems.
  
  
  BACKGROUND
  Percutaneous aortic valve replacement is gaining acceptance as a viable option in patients at high surgical risk. Broader application will require further advances in valve and delivery system technology.
  
  
  METHODS
  Transarterial aortic valve replacement was attempted in 25 patients (mean age 85 years) determined to be at high surgical risk due to comorbidities. A new delivery catheter system (RetroFlex 2, Edwards Lifesciences, Irving, California) was utilized in combination with either a balloon-expandable SAPIEN (Edwards Lifesciences) valve or a next-generation low-profile cobalt-chromium bovine pericardial SAPIEN XT (Edwards Lifesciences) valve.
  
  
  RESULTS
  Percutaneous valve replacement was successful in all 25 high-risk patients. Aortic valve area increased from 0.59 +/- 0.15 cm(2) to 1.60 +/- 0.27 cm(2). In this high-risk cohort (Society of Thoracic Surgeons and logistic EuroSCORE estimates of surgical mortality were 8.9% and 21.0%, respectively), 30-day mortality was 0%.
  
  
  CONCLUSIONS
  Technical and procedural advances in catheter systems and prosthetic valves designed for percutaneous aortic valve delivery may contribute to increased procedural success and improved clinical outcomes.
authors.affiliation: Division of Cardiology, St Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada. webb@providencehealth.bc.ca
authors.forename: John G
authors.initials: JG
authors.lastname: Webb
authors.forename: Lukas
authors.initials: L
authors.lastname: Altwegg
authors.forename: Jean-Bernard
authors.initials: JB
authors.lastname: Masson
authors.forename: Saad
authors.initials: S
authors.lastname: Al Bugami
authors.forename: Abdullah
authors.initials: A
authors.lastname: Al Ali
authors.forename: Robert A
authors.initials: RA
authors.lastname: Boone
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001024:Aortic Valve Stenosis / Q000601:surgery*; D006328:Cardiac Catheterization / Q000295:instrumentation*; D004867:Equipment Design; D005260:Female; D005263:Femoral Artery / Q000601:surgery; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000295:instrumentation*; D006801:Humans; D008297:Male; D011183:Postoperative Complications / Q000517:prevention & control; D011677:Punctures; D016896:Treatment Outcome