A replacement heart valve device usable in a medical procedure in relation in heart valve replacement of a patient. In one embodiment, the replacement heart valve device includes a heart valve holder or conduit holder formed in the form of a cylindrical tube (200) having a longitudinal cut substantially extending from one end to the other end of the cylindrical tube, and a conduit (100) formed with a tubular segment of an elastic material. The conduit is mountable onto the heart valve holder or conduit holder or self-expanding stent. In one embodiment, at least a portion of the conduit is formed with a single layer of the elastic material. In another embodiment, at least a portion of the conduit is formed with two layers of the elastic material.
