Original contributionMorphologic findings and causes of failure in 24 explanted Ionescu-Shiley low-profile pericardial heart valves
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Cited by (28)
Mitroflow pericardial bioprosthesis: Structured failure at 4.5 years
2012, Cardiovascular PathologyCitation Excerpt :Parastent post tears as seen in our case were also common in earlier generations of pericardial valves. Both the Ionescu-Shiley (Shiley Laboratory, Irvine, CA, USA) and Hancock (Hancock-Extracorporeal Inc., Anaheim, CA, USA) pericardial valves were taken off the market as a result of their high rate of early parastent post tears, cusp calcification, and SVD [2,8,9]. In addition, both the Mitroflow and earlier pericardial valves (notably the Ionescu-Shiley) feature cross-stitching (Fig. 1D).
Modes of failure in explanted Mitroflow pericardial valves
2011, Annals of Thoracic SurgeryCitation Excerpt :Cusp tears were seen in 30.4% (n = 7) of valves. Excluding the 1 valve with evidence of IE and cusp tears, type I tears were found in 57.1% (n = 4) excised at 11.3 ± 2.5 years, and type II tears were seen in 42.9% (n = 3) with implant duration of 10.5 ± 8.5 years [7]. Rates of SVD in Hancock valves are reported to occur in 73% of cases.
Transcatheter Aortic Valve Implantation for Failing Surgical Aortic Bioprosthetic Valve: From Concept to Clinical Application and Evaluation (Part 1)
2011, JACC: Cardiovascular InterventionsCitation Excerpt :Calcific deposits have a propensity to develop in areas where leaflet flexion and stress are greatest; that is, at the basal and commissural attachment points. Approximately three-fourths of patients with leaflet calcification and tears suffer from aortic regurgitation (57–60). Because significant aortic regurgitation can be associated with large stroke volumes, transcatheter prostheses can be difficult to position accurately unless rapid pacing is performed during deployment.
Inflammation and infection in nine surgically explanted Medtronic Freestyle® stentless aortic valves
2007, Cardiovascular PathologyA 10-year comparison of explanted Hancock-II and Carpentier-Edwards supraannular bioprostheses
2007, Cardiovascular PathologyCitation Excerpt :Calcification was graded as 0 if absent; 1 if mild and less than 1 mm in length; 2 if moderate, patchy, and up to 1 mm in length; 3 if severe and isolated and up to 2 mm in length; and 4 if very severe, diffuse, greater than 2 mm in length, and capable of tearing through the cusp. Pannus and thrombus were also graded on histological examination, based on the pannus grading system of Butany and Silver [12]. Pannus/thrombus was graded as 0 if absent, 1 if minimal and localized to the porcine aorta or sewing ring only, 2 if mild and extending onto the surface of one or more cusps, and 3 if marked and extending beyond 2 mm on the surface of a cusp.