An apparatus (100) for repairing the function of a diseased valve includes a tubular first support member (102) which is expandable to a first average diameter and has oppositely disposed proximal (104) and distal (106) first support member ends. A tubular second support member (108) is spaced axially apart from the first support member and is expandable to a second average diameter that is smaller than the first average diameter. The second support member has oppositely disposed proximal (110) and distal (112) second support member ends. A tubular graft section (122) interconnects the first (102) and second (108) support members and has oppositely disposed proximal (126) and distal (128) graft section ends axially spaced apart by a graft section body. The proximal graft section end (126) is connected directly to the distal first support member end (106) and the distal graft section end (128) is connected directly to the proximal second support member end (110). A prosthetic valve (shown schematically at 132) may be secured within the annulus (124) of the graft section (122) or may also be part of a collapsible stented apparatus that is delivered in a staged fashion into the device (100) at the level of the annulus (124) at the base of the second support member (108).La présente invention concerne un appareil (100) pour réparer la fonction d'une valve malade qui comprend un premier élément de support tubulaire (102) qui est extensible à un premier diamètre moyen et comporte des premières extrémités d'élément de support proximale (104) et distale (106) disposées de façon opposée. Un deuxième élément de support tubulaire (108) est axialement espacé par rapport au premier élément de support et est extensible à un deuxième diamètre moyen qui est inférieur au premier diamètre moyen. Le deuxième élément de support comporte des deuxièmes extrémités d'élément de support proximale (110) et distale (112) disposées de façon opposée. Une section de greffe tubulaire (122) interc
