A venous valve is bicuspid (getting two leaflets) and is particularly shaped by an infolding of A part of the tunica intima on possibly aspect with the lumen on the veins. The leaflets are strengthened with collagen, and elastic fibres, and lined with endothelium.[ten] The endothelial cells to the surfaces http://sgvascularctr.com/understanding-venous-leak-treatment-in-singapore/