Actuarial versus actual risk of porcine structural valve deterioration

Structural Valve Deterioration After Aortic Valve Replacement with Medtronic Freestyle Stentless Porcine Aortic Root Bioprostheses

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 fr...

Early Structural Valve Deterioration of Mitroflow Aortic Bioprosthesis

Clinical versus actuarial judgment.

Professionals are frequently consulted to diagnose and predict human behavior; optimal treatment and planning often hinge on the consultant's judgmental accuracy. The consultant may rely on one of two contrasting approaches to decision-making--the clinical and actuarial methods. Research comparing these two approaches shows the actuarial method to be superior. Factors underlying the greater acc...

Apicoaortic bypass for a patient with structural valve deterioration of a 19 mm bioprosthetic valve.

We herein report a case of apicoaortic bypass (AAB) in a 79-year old patient presenting with structural valve deterioration who had undergone an aortic valve replacement with a 19 mm bioprosthetic valve and aortocoronary (A-C) bypass grafting 4 years prior to the AAB. Considering the small diameter of the aortic annulus, the existence of a previous A-C bypass and the high risk of reoperation, w...

Structural valve deterioration 4 years after transcatheter aortic valve replacement: imaging and pathohistological findings.