Impairment of pericardial leaflet structure from balloon-expanded valved stents
نویسندگان
چکیده
منابع مشابه
Traumatic leaflet injury during the use of percutaneous valves: a comparative study of balloon- and self-expandable valved stents.
OBJECTIVES No comparison of balloon- or self-expandable valved stents (VSs) regarding tissue injury (if any) has been reported yet. The objective was to evaluate the occurrence and compare the severity of traumatic injury to leaflets from balloon- or self-expandable VSs. METHODS Twelve homemade VSs were used for this experiment. These three-leaflet bovine pericardial bioprostheses had either ...
متن کاملCrimping and deployment of balloon-expandable valved stents are responsible for the increase in the hydraulic conductance of leaflets.
OBJECTIVES Leaflet injury has been documented to occur during the deployment of valved stents (VSs). The pathological aspects, however, of this injury are difficult to quantify. Conversely, the hydraulic conductance of a (pericardial) membrane may be easily determined. The impact of crimping and deployment of VS on this parameter was therefore investigated. METHODS Bovine pericardial square (...
متن کاملPercutaneous pulmonary valve replacement: autologous tissue-engineered valved stents.
AIMS Percutaneous implantation has already been used clinically and is a great option for treating young patients. The use of autologous tissue-engineered valved stents might solve the problem of degeneration and limited durability of biological heart valves. METHODS AND RESULTS Porcine pulmonary heart valves and small intestinal submucosa were obtained from a slaughterhouse. The intestinal s...
متن کاملDouble-crowned valved stents for off-pump mitral valve replacement.
OBJECTIVE An animal model has been designed to assess the feasibility of off-pump mitral valve replacement using valved stents. METHODS Glutaraldehyde-preserved homograft was sutured inside a prosthetic tube (Dacron). Then, two self-expandable nitinol Z-stents were sutured on the external surface of the prosthesis in such a way to create two self-expanding crowns for fixation. In adult pigs a...
متن کاملPericardial patch anterior leaflet extension in rheumatic mitral insufficiency.
This report describes a technique for anterior leaflet extension using an autologous pericardial patch in patients suffering from rheumatic mitral regurgitation. The technique has recently evolved and now enables us to correct both vertical and transversal fibrotic leaflet retraction.
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ژورنال
عنوان ژورنال: The Journal of Thoracic and Cardiovascular Surgery
سال: 2012
ISSN: 0022-5223
DOI: 10.1016/j.jtcvs.2011.11.001