An inferior vena cava (IVC) implant is provided that includes a tubular implant body, which is configured to assume a compressed delivery configuration and an expanded deployment configuration, and configured such that when implanted in the expanded deployment configuration in the IVC in the vicinity of the renal junctions, (a) has a generally tubular shape, (b) has upstream and downstream ends, and (c) is shaped so as to define: (i) two indentations on opposite sides of the tubular implant body, which are shaped so as to allow blood flow in the two indentations from upstream of the tubular implant body to downstream of the tubular implant body, and (ii) one or more surfaces that at least partially block blood flow through an interior of the tubular implant body from upstream of the tubular implant body to downstream of the tubular implant body. Other embodiments are also described.
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