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The Journal of Thoracic and Cardiovascular Surgery, Vol 92, 337-348, Copyright © 1986 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Quantification of regional platelet and calcium deposition on pericardial tissue valve prostheses in calves and effect of hydroxyethylene diphosphonate

MK Dewanjee, E Solis, ST Mackey, J Lenker, WD Edwards, P Didisheim, JH Chesebro, PE Zollman and MP Kaye

Mitral valves were replaced with 25 mm bovine pericardial tissue valve prostheses (Ionescu-Shiley) in 45 calves (23 controls and 22 treated daily with hydroxyethylene diphosphonate). Before being killed 1, 14, 30, and 90 days later, the calves received In-labeled autologous platelets intravenously. Regional variations in platelet deposition were measured by a new technique. Thrombus was noted early on the flexion zone of the valve; with time it increased on the free edge and central zone. Platelet deposition was initially high on the flexion zone, attachment zone, sewing ring, and perivalvular tissue but decreased with time. Hydroxyethylene diphosphonate treatment tended to decrease platelet deposition in all zones. Calcium content was high in thrombus and increased in all zones with time, in both groups, but the deposition was less in the group treated with hydroxyethylene diphosphonate. Collagenous tissue and adherent thrombus appear to provide nucleation sites for calcification.


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 Asian Cardiovasc. Thorac. Ann.Home page
S. W. Chung, J. W. Kim, H. R. Lee, Y. D. Kim, and H. K. Chung
Calcification of Experimental Valve Bioprostheses
Asian Cardiovasc Thorac Ann, March 1, 2001; 9(1): 19 - 23.
[Abstract] [Full Text] [PDF]


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Copyright © 1986 by The American Association for Thoracic Surgery.