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Dokumenttyp:
journal article 
Autor(en):
Botzenhardt, F; Eichinger, WB; Guenzinger, R; Bleiziffer, S; Wagner, I; Bauernschmitt, R; Lange, R 
Titel:
Hemodynamic performance and incidence of patient-prosthesis mismatch of the complete supraannular perimount magna bioprosthesis in the aortic position. 
Abstract:
BACKGROUND: Complete supraannular placement and smaller stent design allow the implantation of a Perimount Magna bioprosthesis with a larger inner diameter than that of a standard Perimount. This study compares the hemodynamic performance and the incidence of patient-prosthesis mismatch (PPM) of both prostheses. METHODS: 128 patients underwent aortic valve replacement, receiving either a Magna (n = 57) or a standard (n = 71) prosthesis. Inner aortic annulus diameter was measured intraoperatively by a hegar dilator to match echocardiographically obtained results to the annulus diameter instead of matching them to labelled valve size. RESULTS: The Magna was significantly superior with respect to mean pressure gradient and effective orifice area in patients with an annulus diameter of 22-23 mm. In patients with an annulus diameter< 22 mm or> 23 mm, there was a non-significant trend towards superior hemodynamics in the Magna group. Severe PPM (effective orifice area index< or = 0.65 cm (2)/m (2)) was present in 11.1% (Magna) vs. 42.1% (Standard) of patients with an annulus diameter< 22 mm; in 0% (Magna) vs. 13.8% (Standard) with an annulus diameter of 22-23 mm; no PPM was seen in patients with annulus diameter> 23 mm in both groups. CONCLUSIONS: The Perimount Magna had a significantly reduced incidence of patient-prosthesis mismatch and superior hemodynamics compared to the standard Perimount. 
Zeitschriftentitel:
Thorac Cardiovasc Surg 
Jahr:
2005 
Band / Volume:
53 
Heft / Issue:
Seitenangaben Beitrag:
226-30 
Sprache:
eng 
Print-ISSN:
0171-6425 
TUM Einrichtung:
chirurgie