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