Abstract: An artificial valve stent for maintaining patent one way flow within a biological passage is disclosed. The artificial valve includes a tubular graft having radially compressible annular spring portions for biasing proximal and distal ends of the graft into conforming fixed engagement with the interior surface of a generally tubular passage. Also disclosed is a deployment catheter including an inner catheter having a nitinol core wire, a controllable tip balloon at its the distal end for dilation and occlusion of the passage, and a controllable graft balloon in the vicinity of and proximal to the tip balloon for fixedly seating the spring portions in conformance with the interior surface of the passage. A spool apparatus for adjusting or removing an improperly placed or functioning artificial valve, and a microembolic filter tube are usable with the deployment catheter.