Document Detail

Uneven host tissue ongrowth and tissue detachment in stent mounted heart valve allografts and xenografts.
MedLine Citation:
PMID:  2532065     Owner:  NLM     Status:  MEDLINE    
Following explanation from the mitral position because of primary tissue failure, 30 human antibiotic sterilised stent mounted aortic valve allografts and 28 glutaraldehyde treated porcine xenografts were examined for evidence of tissue detachment from the stents. These grafts had been in situ for 34 to 166 months. Graft detachment had occurred from one or two stent posts with displacement of the commissures and central valvular incompetence in 12 (67%) of 18 allografts supported on rigid stainless steel stents, in six (50%) of 12 allografts mounted on flexible acetal copolymer stents, but in only one (4%) of 28 xenografts mounted on polypropylene stents. In regions of detachment the aortic remnant of the graft was infiltrated by components of blood and phagocytic cells which had removed not only fibrin but also graft tissue. Detachment did not occur from stent posts where the graft margin had become coated by collagenous host tissue. This intimal fibrous sheath appeared not only to strengthen the attachment of the graft but also to limit the entry of fibrin and phagocytes into the graft tissue.
L Maxwell; J B Gavin; B G Barratt-Boyes
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Cardiovascular research     Volume:  23     ISSN:  0008-6363     ISO Abbreviation:  Cardiovasc. Res.     Publication Date:  1989 Aug 
Date Detail:
Created Date:  1990-02-06     Completed Date:  1990-02-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0077427     Medline TA:  Cardiovasc Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  709-14     Citation Subset:  IM    
Department of Pathology, University of Auckland, New Zealand.
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MeSH Terms
Aortic Valve / pathology,  transplantation*
Heart Valve Prosthesis*
Mitral Valve
Phagocytes / pathology
Polyethylene Terephthalates
Prosthesis Failure
Transplantation, Heterologous
Transplantation, Homologous
Reg. No./Substance:
0/Polyethylene Terephthalates; 0/Polymers; 0/Polypropylenes; 0/acetal copolymer; 12597-69-2/Steel

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