title: [Hemodynamics of various heart valve prostheses].
abstract: Modern tilting disc and bileaflet prostheses, and bio-prostheses, perform similarly regarding pressure gradients, discharge coefficient and performance index; however, only bio-prostheses increase their opening area with increasing flow. Ball valve prostheses of the Starr-Edwards type perform less satisfactorily with higher pressure gradients and lower performance indices, which may result in less favorable long-term follow-up. Bio-prostheses show degenerative changes with increasing age which, over a period of 7-10 years, can lead to clinically relevant stenoses necessitating reoperation.
authors.affiliation: Kardiologische Abteilung, Kantonsspital Basel.
authors.forename: D
authors.initials: D
authors.lastname: Burckhardt
authors.forename: P
authors.initials: P
authors.lastname: Weiss
authors.forename: M
authors.initials: M
authors.lastname: Peter
authors.forename: A
authors.initials: A
authors.lastname: Hoffmann
mesh_terms: D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D006439:Hemodynamics; D006801:Humans; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D013997:Time Factors
vernacular_title: Die Hämodynamik verschiedener Herzklappen-Prothesen.