title: Intermediate follow-up results from the multicenter engager European pivotal trial.
abstract: BACKGROUND
  Optimal transcatheter aortic valve (TAVI) results require accurate valve positioning, including anatomically correct orientation and secure fixation within the aortic annulus, thereby potentially decreasing paravalvular regurgitation. The new Engager (Medtronic 3F Therapeutics, Santa Ana, CA) transapical valve system captures the native leaflets for sealing and allows for tactile feedback during valve placement. We report initial safety and performance outcomes of the Engager system through 6 months in patients with severe aortic valve stenosis at high risk for surgical aortic valve replacement.
  
  
  METHODS
  An interim analysis was performed on the first 61 enrolled September 2011 through May 2012. Inclusion criteria comprised severe aortic stenosis, New York Heart Association functional class of II or greater, logistic European System for Cardiac Operative Risk Evaluation (EuroSCORE) of 20% or greater, or contraindication to surgical aortic valve replacement. The primary endpoint was all-cause mortality at 30 days. Patients were evaluated 24 to 48 hours post-procedure, at hospital discharge, 30 days and 6 months. Follow-up is planned annually through five years.
  
  
  RESULTS
  Baseline characteristics for the 61 patients were mean age 81.9 ± 4.4 years, 62.3% female, 88.5% New York Heart Association class III/IV, 52.5% coronary artery disease, and 54.2% extracardiac arteriopathy. For all of the attempted implantations (n = 60), the Engager prosthesis was positioned in the correct anatomic position without conversions to surgery, second valve implantation, device malposition, aortic annular rupture, or coronary obstruction. All-cause mortality was 9.9% at 30 days and 16.9% at 6 months. The baseline mean aortic valve gradient was 43.7 ± 16.7 mm Hg and 11.5 ± 5.0 mm Hg at 30 days, and showed similar reduction at 6 months (13.9 ± 6.2 mm Hg). There was no paravalvular regurgitation greater than mild through 6 months.
  
  
  CONCLUSIONS
  Early postoperative results support implantation success and valve safety. Analysis for 6 month outcomes shows stable hemodynamic performance and clinical outcome. (Transapical Implantation of the Medtronic Engager Transcatheter Aortic Valve Implantation System-the Engager European Pivotal Trial; NCT01348438).
authors.affiliation: Department of Cardiovascular Surgery and Department of Internal Medicine/Cardiology, Heart Center Leipzig, Leipzig, Germany. Electronic address: dholzhey@web.de.
authors.forename: David
authors.initials: D
authors.lastname: Holzhey
authors.forename: Axel
authors.initials: A
authors.lastname: Linke
authors.forename: Hendrik
authors.initials: H
authors.lastname: Treede
authors.forename: Stephan
authors.initials: S
authors.lastname: Baldus
authors.forename: Sabine
authors.initials: S
authors.lastname: Bleiziffer
authors.forename: Anke
authors.initials: A
authors.lastname: Wagner
authors.forename: Jochen
authors.initials: J
authors.lastname: Börgermann
authors.forename: Werner
authors.initials: W
authors.lastname: Scholtz
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Vanoverschelde
authors.forename: Volkmar
authors.initials: V
authors.lastname: Falk
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging / Q000401:mortality / Q000601:surgery*; D006328:Cardiac Catheterization / Q000379:methods*; D002423:Cause of Death / Q000639:trends; D004452:Echocardiography; D005240:Feasibility Studies; D005260:Female; D005500:Follow-Up Studies; D005858:Germany / Q000453:epidemiology; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D015996:Survival Rate / Q000639:trends; D013997:Time Factors; D016896:Treatment Outcome; D016277:Ventricular Function, Left / Q000502:physiology*
keywords: 35