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Ann Thorac Surg 2001;71:S323-S326
© 2001 The Society of Thoracic Surgeons

Bioprosthetic valves and conduits: new developments

Early experience with a quadrileaflet stentless mitral valve

Britt Hofmann, MDa, Romuald Cichon, MDa, Michael Knaut, MDa, Utz Kappert, MDa, Sems M. Tugtekin, MDa, Wilma Aron, MDa, Stephan Schüler, MD, PhDa

a Cardiovascular Institute, University of Dresden, Dresden, Germany

Address reprint requests to Dr Schüler, Cardiovascular Institute, University of Dresden, Fetscherstrasse 76 D-01307 Dresden, Germany
e-mail: monika.weber.hkz_dd{at}t-online.de

Presented at the VIII International Symposium on Cardiac Bioprostheses, Cancun, Mexico, Nov 3–5, 2000.

Background. Presently no ideal prosthesis for mitral valve replacement exists. The quadrileaflet mitral valve (SJM-Quattro-MV; St. Jude Medical, Inc, St. Paul, MN) is a chordally supported stentless bioprosthesis. Due to its specific geometry it seems to be particularly suited for mitral valve replacement.

Methods. From March 1999 to October 2000, 12 patients (ages 71 ± 2 years) received the SJM-Quattro-MV. Six patients suffered from valvular stenosis and 6 patients from incompetence. Preoperatively, all patients were in New York Heart Association functional class III, with left ventricular ejection fraction amounts of 54% ± 17%.

Results. Eleven patients received a medium size SJM-Quattro-MV and one patient received a large size SJM-Quattro-MV. Cross-clamp time was 99.8 ± 4.9 minutes. Additional procedures were coronary artery bypass grafting (n = 3) and left atrial microwave ablation (n = 2). Postoperative mortality (n = 1) was procedure related. At follow-up of 11.6 ± 5.4 months, all patients were well, the transvalvular pressure gradient was 5.0 ± 1.4 mm Hg, and the effective orifice area 2.7 ± 0.2 cm2.

Conclusions. Our preliminary experiences with the SJM-Quattro-MV presented good clinical results and promoted an optimistic way of thinking about the further development of these valve prostheses.




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