title: [Destruction of the aortic allo- and xenovalves of the heart depending on their position and time of transplantation].
abstract: The aortic valve, as well as the other valves of the heart, has a cellular structure. Collagenous fibres form the skeleton of the cellular structures, and the plexus of thinner fibres--the "walls". At early periods following the implantation destruction of thin fibres distributed along the periphery of the alveolus takes place. In the course of prolonged functioning of the allo- and xenovalves in a mitral position the large collagenous fibres collapse, defibration thereof develops and slits-vacuums and "cysts" are formed. In the valves which functioned for a long time in the tricuspid position no considerable destructive changes in the connective-tissue carcass take place.
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000473:pathology / Q000637:transplantation* / Q000648:ultrastructure; D006349:Heart Valve Diseases / Q000473:pathology; D006801:Humans; D008855:Microscopy, Electron, Scanning; D008856:Microscopy, Fluorescence; D011183:Postoperative Complications; D012422:Rupture, Spontaneous; D013552:Swine; D013997:Time Factors; D014183:Transplantation, Heterologous; D014184:Transplantation, Homologous
vernacular_title: Zavisimost' destruktsii aortal'nykh allo- i ksenoklapanov serdtsa ot ikh pozitsii i srokov transplantatsii