Key result
Medtronic Freestyle stentless bioprostheses linked to non-calcific structural valve deterioration requiring late reoperation.
Why the study?
Sporadic reports of structural valve deterioration such as aortic root wall rupture, leaflet tearing, and pseudoaneurysm formation have been observed with Medtronic freestyle stentless aortic root bioprostheses.
Case Report (n=5)
No
Answers are grounded in this paper and cite their sources.
May warrant closer surveillance for late non-calcific SVD after Freestyle AVR; extends prior reports of leaflet and root failure modes.
The Medtronic freestyle aortic root bioprosthesis (Medtronic, Inc., Minneapolis, MN, USA) is a stentless valve with an effective orifice area that is larger than that observed on other bioprostheses. However, there have been sporadic reports of structural valve deterioration (SVD), such as aortic root wall rupture, leaflet tearing, and pseudoaneurysm formation. We report five cases of SVD of freestyle aortic root bioprostheses.
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Nishida et al. (2013) conducted a case report in Structural valve deterioration (n=5). Medtronic Freestyle aortic root bioprosthesis was evaluated on Structural valve deterioration requiring reoperation. Five patients developed structural valve deterioration, including leaflet perforation and commissure tearing without calcification, requiring reoperation 5 to 11 years after aortic valve replacement with Medtronic Freestyle stentless bioprostheses.
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