Key result
Rare 8-mm Medtronic Freestyle bioprosthesis tear leads to sudden aortic rupture, pseudoaneurysm, and shock.
Why the study?
Mid-term structural valve deterioration unique to Medtronic Freestyle stentless bioprosthesis implantation has been reported, involving degeneration of the porcine aortic wall causing sinus of Valsalva disruption.
Case Report (n=1)
Highlights a rare but severe complication of structural valve deterioration (wall rupture and pseudoaneurysm) in the Medtronic Freestyle stentless bioprosthesis.
Answers are grounded in this paper and cite their sources.
May warrant surveillance for rare Freestyle rupture; leaves open true incidence and risk factors.
The Medtronic Freestyle stentless bioprosthetic valve provides excellent hemodynamics and long-term durability. However, several studies have reported mid-term structural valve deterioration unique to cases of Freestyle bioprosthesis implantation. According to these reports, the degeneration of the porcine aortic wall causes the dilatation and disruption of the sinus of Valsalva. We encountered a very rare case of an 8 mm-long tear located just above the inflow end of the Dacron cloth. The sudden rupture of the bioprosthetic aortic wall formed a pseudoaneurysm that compressed and almost occluded the pulmonary artery leading to low cardiac output syndrome and shock.
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Tomohiro Mizuno (2008) conducted a case report in Wall rupture of Medtronic Freestyle stentless porcine aortic root bioprosthesis (n=1). Medtronic Freestyle stentless porcine aortic root bioprosthesis was evaluated on Wall rupture and pseudoaneurysm formation. A rare case of an 8 mm-long tear in a Medtronic Freestyle bioprosthesis caused a sudden aortic wall rupture and pseudoaneurysm, leading to pulmonary artery compression and shock.
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