Bioprosthetic Heart Valves: Impact of Implantation on Biomaterials
Figure 1
(a) Histologic section of a CEP valve cusp shows pannus “P” and calcification (asterisk) of the cusp. (b) Histologic section of ISLP valve shows cusp “C” with pannus “P” on the valve. The area corresponding to the free margins of the cusp shows new pannus characterized by the fibroblasts and myofibroblasts while the area below it shows old pannus characterized by collagen fibres. (a) and (b) Stain: Movat pentachrome. Original magnification (a) ×2.5; (b) ×5.
