The Annals of Thoracic Surgery, Vol 21, 475-482, Copyright © 1976 by The Society of Thoracic Surgeons
Late clinical problems with Beall model 103 and 104 mitral valve prostheses: hemolysis and valve wear
RE Clark, FL Grubbs, RC McKnight, TB Ferguson, CL Roper and CS Weldon
The purpose of this study was to determine the influence on hemolysis of
the spatial orientation of the struts in the Beall mitral valve prosthesis,
Models 103 and 104. Thirteen pairs of patients were selected to match
struts oriented parallel and perpendicular to the left ventricular outflow
tract axis. The average time after operation was 3.73 years. Complete blood
counts and relative serum chemistry values were determined.