(A and B) Bioprosthesis 18 months post-implantation, with a layer of white connective tissue at the ventricular surface. Bar = 1 cm. (C) Microscopic examination showing the compact acellular connective tissue of the bioprosthesis (bottom) covered with a layer of loose connective tissue with fibroblasts (top). Haematoxylin and eosin. Bar = 500 µm. (D) Higher magnification of C. Bar = 100 µm.
Figure 1:

(A and B) Bioprosthesis 18 months post-implantation, with a layer of white connective tissue at the ventricular surface. Bar = 1 cm. (C) Microscopic examination showing the compact acellular connective tissue of the bioprosthesis (bottom) covered with a layer of loose connective tissue with fibroblasts (top). Haematoxylin and eosin. Bar = 500 µm. (D) Higher magnification of C. Bar = 100 µm.