An implantable device (10) is disclosed, which comprises a support structure (20), a valve assembly (40), and a connection mechanism (60). The implantable device has a first configuration and a second configuration. In the first configuration, the support structure is unfolded and the support structure, the valve assembly, and the connection mechanism are axially arranged. In the second configuration, the connection mechanism is rotated such that a first portion (26) of the support structure is inverted into a second portion (26) of the support structure and the valve assembly is drawn at least partially into the first portion by the connection mechanism.
