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. 1978 Feb;187(2):183–188. doi: 10.1097/00000658-197802000-00016

Late failure in vein grafts: mediating factors in subendothelial fibromuscular hyperplasia.

P E Karayannacos, J R Hostetler, M G Bond, G S Kakos, R A Williams, J W Kilman, J S Vasko
PMCID: PMC1396485  PMID: 147063

Abstract

Late failure of autologous vein grafts often results from excessive subendothelial fibromuscular hyperplasia. Varying factors have been implicated in this process, but the exact etiology remains unclear. In this study, three groups of animals were studied which had sections of common carotid artery replaced with autologous vein grafts. Group I had simple replacement, while Groups II and III had grafts supported by either tightly woven or loose mesh dacron prostheses. Thrombosis occurred only in the unsupported grafts. Unsupported grafts also had more subendothelial proliferation when compared to the loose mesh group. The combined thickness of the intima-media correlated inversely with the number of vasa present within the vein graft wall, i.e. significantly more vascularization was found in the mesh supported group when compared to the other groups. Grafts supported with the tightly woven prosthesis were relatively impervious to the ingrowth of vasa vasora. The data suggest that persistent distension of the graft wall by intra-arterial pressure influences the degree of subendothelial fibromuscular hyperplasia and may be interrelated to revascularization of the graft wall per se.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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