A venous valve is bicuspid (having two leaflets) which is formed by an infolding of Element of the tunica intima on both side on the lumen in the veins. The leaflets are strengthened with collagen, and elastic fibres, and covered with endothelium.[ten] The endothelial cells on the surfaces on the http://sgvascularctr.com/understanding-venous-leak-treatment-in-singapore/