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The Journal of Thoracic and Cardiovascular Surgery, Vol 90, 557-563, Copyright © 1985 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Cuspal perforations caused by long suture ends in implanted bioprosthetic valves

M Jones, ER Rodriguez, EE Eidbo and VJ Ferrans

A description is presented of the gross anatomic, histologic, and scanning electron microscopic features of cuspal abrasions, perforations, and tears caused by excessively long ends of braided sutures in bioprosthetic cardiac valves implanted in the mitral position in sheep. These lesions are produced as consequences of contact between the ends of the sutures and the inflow surfaces of the bioprosthetic cusps, leading to a process of surface erosion that progresses to actual perforation of the cusps. The perforation has the appearance of a crater, the wider end of which faces the inflow surface and the walls of which are formed by broken ends of collagen fibrils. Suture perforations can extend to form tears that involve the free edge of the cusp and result in hemodynamically important regurgitation. Therefore, care must be taken to avoid leaving excessively long suture ends during the implantation of bioprosthetic cardiac valves.


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K. Tamura, M. Jones, I. Yamada, and V. J. Ferrans
A comparison of failure modes of glutaraldehyde-treated versus antibiotic-preserved mitral valve allografts implanted in sheep
J. Thorac. Cardiovasc. Surg., July 1, 1995; 110(1): 224 - 238.
[Abstract] [Full Text]


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Copyright © 1985 by The American Association for Thoracic Surgery.