A valve (100, 300) comprising: a valve structure (102, 302) having a distal end (114) and one end (112) proximal and members (106) structure defining a lumen (108, 308 ), a valve leaflet (104, 304) attached to a portion of the valve structure (102, 302), wherein the deválvula leaflet (104, 304) having a distal end (118) and one end (116, 216) proximal, in which a distal end portion (118, 218) of the valve leaflet (104, 304) is connected adjacent one end (112, 312) proximalde the valve structure (102, 302) and a member (110, 310) leaflet transition which is attached to at least a portion of the valve leaflet (104.304) characterized in that the member (110, 310) leaflet transition is a ring structure that is coupled alextremo (116) proximal of the valve leaflet (104, 304), wherein the valve leaflet (104, 304) and the member (110, 310) leaflet transition extend away from the lumen (108, 308) in a first position and estándispuestos for transition to a second position where the valve leaflet (104, 304) and the member (110.310) leaflet transition are within the lumen (108, 308) of the valve structure (102, 302), laque member (110, 310) leaflet transition expands from a first diameter to a segundodiámetro to ensure member (110, 310) leaflet transition in the second position.Una válvula (100, 300), que comprende: una estructura de válvula (102, 302) que tiene un extremo (114) distal y un extremo (112) proximal y miembros (106)de estructura que definen un lumen (108, 308), una hojuela de válvula (104, 304) unida a una porción de la estructura de válvula (102, 302), en la que la hojuela deválvula (104, 304) tiene un extremo (118) distal y un extremo (116, 216) proximal, en la que una porción del extremo(118, 218) distal de la hojuela de válvula (104, 304) está unida de forma adyacente a un extremo (112, 312) proximalde la estructura de válvula (102, 302), y un miembro (110, 310) de transición de hojuela que está unido a al menos una porción de la hojuela de válvula (104,304)
