Systems for providing or maintaining fluid flow through body passages

A device includes a first terminal portion, a second terminal portion, an intermediate portion, and a graft material. The first terminal portion has a first terminal diameter. The second terminal portion has a second terminal diameter smaller than the first terminal diameter. The first terminal portion comprises a first material. The second terminal portion comprises a second material different from the first material. The intermediate portion is between the first terminal portion and the second terminal portion. The intermediate portion tapers between the first terminal portion and the second terminal portion. The graft material is coupled to at least the intermediate portion. (Automatic translation with Google Translate, no legal value)