title: Visualizing anatomical evidences on atrioventricular conduction system for TAVI.
abstract: Visualizing the anatomy of the atrioventricular (AV) conduction axis substantiates that there is remarkable inter-individual variation at the macro- and microscopic levels, and that the atrioventricular bundle and left bundle branch are located more anteriorly, distally, and cranially and much closer to the aortic root complex than previously thought. The AV conduction system may therefore be compromised during implantation of a transcatheter aortic valve prosthesis, which may account for the relatively high incidence of new cardiac conduction abnormalities when conventional prosthetic valves are used. The design of the newer JenaValve® may afford advantages over more conventional valves by avoiding the high-risk implantation area and the potential for coronary ostia obstruction.
authors.affiliation: Department of Anatomy, School of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan. Electronic address: tomokazu.kawashima@med.toho-u.ac.jp.
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Kawashima
authors.affiliation: Department of Anatomy, School of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan.
authors.forename: Fumi
authors.initials: F
authors.lastname: Sato
mesh_terms: D063405:Anatomic Variation; D006329:Heart Conduction System / Q000033:anatomy & histology*; D019918:Heart Valve Prosthesis Implantation / Q000379:methods; D006801:Humans; D012307:Risk Factors
keywords: Aortic stenosis; Atrioventricular conduction system; Clinical anatomy; New conduction abnormalities; Transcatheter aortic valve implantation