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Ann Thorac Surg 1975;19:494-502
© 1975 The Society of Thoracic Surgeons

Articles

Viability Properties in Autologous Fascia Lata Heart Valve Grafts: A Transmission Electron Microscopical Study

Roger Willén, M.D.*, Wieslaw T. Dubiel, M.D., Lennart Johansson, M.D.

Departments of Pathology and Thoracic and Cardiovascular Surgery, University Hospital, Uppsala, Sweden

Accepted for publication December 11, 1974.

* Address reprint requests to Dr. Willén, Department of Pathology, Box 553, S-751 22 Uppsala, Sweden

Four frame-mounted autologous fascia lata heart valve grafts in situ for 18 to 41 months as well as one free-mounted fascia cusp in situ for 10 years were examined by transmission electron microscopy (TEM).

In all cusps, areas of well-preserved subcellular structures were found as well as areas with degeneration and fragmentation of both nuclear and collagen fibers. Fibrocytes, fibroblasts, and a special cell form, the myofibroblast, were encountered. The appearance of this last cell form may explain the shrinkage phenomenon encountered in these valves, all retrieved at reoperation because of valve dysfunction. Some of the fascial cells thus stayed alive within the bloodstream for up to 10 years.




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Vascular and Endovascular Surgery, March 1, 1976; 10(2): 99 - 120.
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