A replacement valve for use within a human body comprising: a valve component; and a stent component configured to house at least a portion of the valve component comprising a proximal end and a distal end, the stent component further comprising: a distal stent section defining the distal end and comprising a stabilization arch section and a commissural post section communicating with the stabilization arch section, the commissural post section defining supports for the valve component; a proximal anchoring section defining the proximal end; and a first crown section communicating with the distal stent section and with the proximal anchoring section, the first crown section comprising a first divergent portion that diverges outwardly in a direction towards the distal end, the first crown section having a free end characterized in that the stabilization arch section comprises a plurality of stabilization arches (1; 11) for bearing against the ascending aorta for alignment of the stent component with respect to the ascending aorta, each stabilization arch (1; 11) comprising: a divergent portion that diverges away from the stent axis, in a direction toward the distal end; and an arch apex tip inclined at an angle (alpha5) measured from the divergent portion in a direction towards the stent axis. a valve component; and a stent component configured to house at least a portion of the valve component comprising a proximal end and a distal end, the stent component further comprising: a distal stent section defining the distal end and comprising a stabilization arch section and a commissural post section communicating with the stabilization arch section, the commissural post section defining supports for the valve component; a proximal anchoring section defining the proximal end; and a stent component configured to house at least a portion of the valve component comprising a proximal end and a distal end, the stent component further comprising: a distal stent section defining the distal end and comprising a stabilization arch section and a commissural post section communicating with the stabilization arch section, the commissural post section defining supports for the valve component; a proximal anchoring section defining the proximal end; and a distal stent section defining the distal end and comprising a stabilization arch section and a commissural post section communicating with the stabilization arch section, the commissural post section defining supports for the valve component; a proximal anchoring section defining the proximal end; and a first crown section communicating with the distal stent section and with the proximal anchoring section, the first crown section comprising a first divergent portion that diverges outwardly in a direction towards the distal end, the first crown section having a free end characterized in that the stabilization arch section comprises a plurality of stabilization arches (1; 11) for bearing against the ascending aorta for alignment of the stent component with respect to the ascending aorta, each stabilization arch (1; 11) comprising: a divergent portion that diverges away from the stent axis, in a direction toward the distal end; and an arch apex tip inclined at an angle (alpha5) measured from the divergent portion in a direction towards the stent axis. a divergent portion that diverges away from the stent axis, in a direction toward the distal end; and an arch apex tip inclined at an angle (alpha5) measured from the divergent portion in a direction towards the stent axis. an arch apex tip inclined at an angle (alpha5) measured from the divergent portion in a direction towards the stent axis.