title: Anatomic suitability for present and next generation transcatheter aortic valve prostheses: evidence for a complementary multidevice approach to treatment.
abstract: OBJECTIVE
  This study sought to assess the proportion of patients anatomically suitable for transcatheter aortic valve implantation by multiple access approaches.
  
  
  BACKGROUND
  The devices currently in mainstream use for transcatheter treatment of severe aortic stenosis are those of Edwards (Edwards Lifesciences, Nyon, Switzerland) and Medtronic CoreValve (M-C) (Luxembourg City, Luxembourg). The range of patients that these can presently treat requires elucidation to guide the necessary evolution of these technologies and increase their scope of therapy.
  
  
  METHODS
  A consecutive series of patients were assessed with transthoracic or transesophageal echocardiography and invasive angiography to assess anatomical suitability by different approaches. The transfemoral access requirements for Edwards and M-C (Edwards currently 22- and 24-F, soon to be 18- and 19-F; M-C 18-F) as well as the aortic valve annular criteria (18 to 25 mm and 20 to 27 mm, respectively) were incorporated in this assessment. Patients unsuitable for the transfemoral approach were considered for Edwards transapical and M-C transaxillary and direct ascending aortic access. Patients suitable for these devices and access approaches were identified.
  
  
  RESULTS
  Data were analyzed for 100 consecutive patients. Edwards suitability was 28% for Edwards-Sapien transfemoral, 78% for Edwards Novaflex transfemoral, and 88% for Edwards-Sapien transapical. Medtronic CoreValve suitability was 84% for transfemoral and 89% using additional transaxillary and direct aortic approaches. Of the 12 patients unsuitable for Edwards-based procedures, 8 were suitable for M-C. Of the 11 patients unsuitable for M-C-based techniques, 8 were suitable for Edwards. Only 3% were anatomically unsuitable for all approaches.
  
  
  CONCLUSIONS
  In this series, 97% of patients were anatomically suitable for a complementary approach to treatment.
authors: Montreal Heart Institute, Montreal, Quebec, Canada.
authors: Hasan
authors: H
authors: Jilaihawi
authors: Raoul
authors: R
authors: Bonan
authors: Anita
authors: A
authors: Asgar
authors: Réda
authors: R
authors: Ibrahim
authors: Tomasz
authors: T
authors: Spyt
authors: Derek
authors: D
authors: Chin
authors: Jan
authors: J
authors: Kovac
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography; D001011:Aorta / Q000473:pathology; D001021:Aortic Valve / Q000000981:diagnostic imaging; D001024:Aortic Valve Stenosis / Q000175:diagnosis / Q000628:therapy*; D006328:Cardiac Catheterization / Q000295:instrumentation; D017548:Echocardiography, Transesophageal; D004739:England; D005263:Femoral Artery / Q000000981:diagnostic imaging; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D018579:Patient Selection; D011237:Predictive Value of Tests; D011446:Prospective Studies; D011474:Prosthesis Design; D011792:Quebec; D012720:Severity of Illness Index; D016896:Treatment Outcome