A transcatheter temporary valve prosthesis for blood vessel comprising an expandable support structure (5"), a valve (7), a filter (12) and a conveyor (6)； said support structure (5") forming a tubular shape when expanded, with a distal and a proximal end, said valve (7) being located at said distal end and said conveyor (6) extending within said support structure (5), from said proximal to said distal end and including a central passage that is adapted to act as an introducer for other devices.
