Mitroflow Bioprosthesis Stent Deformation: A Rare Cause of Early Prosthetic Stenosis
DOI:
https://doi.org/10.1532/HSF98.20081144Abstract
We report the case of a severe prosthetic aortic stenosis in a 61-year-old male patient with an aortic Mitroflow LF bioprosthesis (Sorin Group) at early (6 months) postoperative echocardiographic follow-up. At reintervention, we found significant stent deformation, asymmetric orientation of the posts, and subsequent central kinking and prolapse of one leaflet. Maldistribution of pledgeted mattress sutures over the flexible stent was found to be the origin of its permanent deformation. Simple technical preventive strategies of this previously unreported complication are suggested.References
García-Bengochea J, Sierra J, González-Juanatey JR, Rubio J, Vega M, Fernández AL, Sánchez D. 2006. Left ventricular mass regression after aortic valve replacement with the new Mitroflow 12A pericardial bioprosthesis. J Heart Valve Dis 15:446-51, discussion 451-2.nGerosa G, Tarzia V, Rizzoli G, Bottio T. 2006. Small aortic annulus: the hydrodinamic performances of 5 commercially available tissue valves. J Thorac Cardiovasc Surg 131:1058-64.nMinami K, Boethig D, Mirow N, et al. 2000. Mitroflow pericardial valve prosthesis in the aortic position: an analysis of long-term outcome and prognostic factors. J Heart Valve Dis 9:112-22.nPomar JL, Jamieson WR, Pelletier LC, Castellá M, Germann E, Brownlee RT. 1998. Mitroflow pericardial bioprosthesis experience in aortic valve replacement ?60 years of age. Ann Thorac Surg 66(suppl):S53-6.nSjögren J, Gudbjartsson T, Thulin LI. 2006. Long-term outcome of the Mitroflow pericardial bioprosthesis in the elderly after aortic valve replacement. J Heart Valve Dis 15:197-202.nThulin LI, Thilén UJ, Kymle KA. 2000. Mitroflow pericardial bioprosthesis in the aortic position. Low incidence of structural valve deterioration in elderly patients during an 11-year follow-up. Scand Cardiovasc J 34:192-6.nTotaro P, Fellini M, Zogno M, Borghetti V, Coletti G, Lorusso R. 2000. Aortic valve replacement with Mitroflow bioprosthesis in elderly patients with small aortic annulus. Cor Europaeum 8:71-75.nYankah CA, Schubel J, Buz S, Siniawski H, Hetzer R. 2005. Seventeen-year clinical results of 1,037 Mitroflow pericardial heart valve prostheses in the aortic position. J Heart Valve Dis 14:172-9, discussion 179-80.n
