In vitro comparison of different mechanical prostheses suitable for replacement of the systemic atrioventricular valve in children

Abstract

OBJECTIVE: The aim of the present study was to compare the hydrodynamics of 4 different mechanical prostheses fitting the atrioventricular annulus in children. METHODS: We tested different inverted aortic prostheses with a prosthesis-annulus relationship in the mitral chamber of the Sheffield pulse duplicator (Department of Medical Physics and Clinical Engineering, Royal Hallamshire Hospital, Sheffield, UK), analyzed by comparing the prosthetic housing diameter and the predicted annulus diameter based on body surface area (0.8 and 1 m(2) corresponding to an annulus diameter of 18.8-20.2 mm). The On-X 19 (On-X Life Technologies, Inc, Austin, Tex), SJM Regent 19 (St Jude Medical Inc, St Paul, ..