Aortic stent

A stent for placement at an aortic annulus that is expandable from an undeployed state to a deployed state, the stent comprising:

• a stent frame having rows of cells with a proximal section and a distal section at a longitudinal axis of the stent, wherein a diameter of the distal section and the proximal section is larger than a diameter of a middle section arranged between the distal section and the proximal section, the stent frame being formed by a plurality of arms, the plurality of arms being connected to one another at connection points, and wherein the plurality of arms forms a plurality of diamond-shaped stent cells, in particular the rows of cells, formed of vertices at said connection points between the plurality of arms, and wherein the stent frame has a shape that corresponds to the shape of a nucleus of a torus,
• a dry valve made out of bovine pericardium arranged at least at the distal section of the stent with the dry bovine pericardium being configured to be rehydrated with a solution, wherein the dry bovine pericardium has a maximum tensile stress selected in a range of 20 to 25 MPa, wherein the rehydrated bovine pericardium has a tensile stress selected in a range of 12 to 15 MPa, and wherein the dry bovine pericardium is formed using a method of treatment comprising the steps of:
• (1) soaking the bovine pericardium treated with a crosslinking agent with a saline solution,
• (2) subsequent to step (1), contacting the bovine pericardium with an aqueous solution comprising Hydrogen Peroxide,
• (3) subsequent to step (2), contacting the bovine pericardium with an aqueous solution comprising PBS and EDTA,
• (4) subsequent to step (3), contacting the bovine pericardium with a solution comprising glycerol, ethanol and EDTA, and
• (5) subsequent to step (4), contacting the bovine pericardium with a glycerol solution,
• a skirt surrounding the dry valve and comprising at least one of bovine pericardium and polyester,
• two or more eyelets arranged at a distal end of at least one of the arms, wherein the dry valve is fixed to the at least one of the arms by connection to each of the two or more eyelets.