title: Cardiac CT: necessary for precise sizing for transcatheter aortic implantation.
abstract: Sizing for transcutaneous aortic valve replacement (TAVI) relies on non-invasive imaging. Incorrect sizing may result in adverse outcomes including paraprosthetic regurgitation, asymmetrical expansion which may impair prosthesis durability and, in the case of severe sizing errors, device embolisation or aortic root rupture. This review addresses the optimal approach for sizing. It is based on currently available data including the anatomical implications of using different imaging modalities, the steps of how to reproducibly measure the correct annulus diameter on MSCT, and current evidence for different sizing strategies.
authors.affiliation: Department of Cardiology, Erasmus MC Rotterdam, The Netherlands. c.schultz@erasmusmc.nl
authors.forename: Carl J
authors.initials: CJ
authors.lastname: Schultz
authors.forename: Adriaan D
authors.initials: AD
authors.lastname: Moelker
authors.forename: Apostolos
authors.initials: A
authors.lastname: Tzikas
authors.forename: Alexia
authors.initials: A
authors.lastname: Rossi
authors.forename: Robert-Jan
authors.initials: RJ
authors.lastname: van Geuns
authors.forename: Pim J
authors.initials: PJ
authors.lastname: de Feyter
authors.forename: Patrick W
authors.initials: PW
authors.lastname: Serruys
mesh_terms: D001021:Aortic Valve / Q000000981:diagnostic imaging*; D006328:Cardiac Catheterization / Q000009:adverse effects / Q000295:instrumentation*; D017548:Echocardiography, Transesophageal; D006349:Heart Valve Diseases / Q000000981:diagnostic imaging* / Q000628:therapy; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D017410:Practice Guidelines as Topic; D011237:Predictive Value of Tests; D011474:Prosthesis Design; D011857:Radiographic Image Interpretation, Computer-Assisted; D012984:Software; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome