Aortic valve replacement prosthesis

An aortic valve replacement prosthesis comprising a valve stent (100), a plurality of valve leaflets, an inner skirt and an outer skirt,

• wherein the valve stent (100) is radially compressible and comprises a tubular body (105) made of a metal grid and having a circumference extending along a longitudinal axis (60);
• wherein the tubular body (105) comprises a first longitudinal end portion (101), a second longitudinal end portion (103), and an intermediate portion (102) disposed between the first and second longitudinal end portions (101, 103),
• wherein the tubular body (105) has an inner circumferential surface defining an inner cavity (90) of the tubular body (105) and an outer circumferential surface defining an outer surface (91) of the tubular body (105), the inner and outer circumferential surfaces extending substantially concentrically along the longitudinal axis (60);
• wherein a plurality of support arms (50) are provided on the intermediate portion (102) of the tubular body (105) and are spaced from each other around a circumferential direction of the tubular body (105), and are integrally formed with the tubular body (105), without being welded or fastened to the tubular body (105);
• the plurality of valve leaflets are disposed on the intermediate portion (102) of the inner cavity (90) of the tubular body (105),
• the inner skirt is affixed to the second longitudinal end portion (103) of the inner cavity (90) of the tubular body (105) and fixedly connected with the valve leaflets,
• the outer skirt is affixed to the second longitudinal end portion (103) of the outer surface (91) of the tubular body (105) and fixedly connected with the inner skirt, and
• each support arm (50) comprises a lower support arm (52), a first bending section (59), a platform section (51), a second bending section (59), and an upper support arm (53) that are connected in sequence,
• each of the lower support arm (52), the platform section (51), and the upper support arm (53) comprises a lower landing area (54), a middle landing area (54), and an upper landing area (54), respectively,
• wherein each bending section (59) is a single, continuously contoured portion having a narrow middle portion between two adjacent landing areas (54) and smoothly flared end regions that merge gradually into the landing areas (54) so as to avoid a sharp step and to facilitate bending of the support arm (50).