Embedded radiopaque marker in adaptive seal

A method of locating a replacement heart valve implant during an implantation procedure, comprising:

• advancing the replacement heart valve implant through a vasculature toward a native heart valve in a delivery configuration, the replacement heart valve implant comprising:
• an expandable tubular support structure defining a central longitudinal axis, a plurality of valve leaflets disposed within the tubular support structure, and a seal member comprising:
• a tubular polymeric seal element disposed on an outer surface of the tubular support structure and a reinforcement strip fixedly attached to the tubular polymeric seal element at a distal end of the tubular polymeric seal element, the reinforcement strip extending circumferentially around the central longitudinal axis at an inflow end of the tubular support structure;
• wherein the reinforcement strip includes a scalloped downstream edge and a radiopaque element extending circumferentially around the central longitudinal axis in a first plane;
• imaging the replacement heart valve implant within the vasculature and the native heart valve concurrently as the replacement heart valve implant approaches the native heart valve, wherein the imaging identifies a reference plane extending through an annulus of the native heart valve generally perpendicular to a direction of fluid flow through the native heart valve;
• and
• expanding the tubular support structure within the native heart valve with the first plane positioned substantially parallel to the reference plane and offset less than 4 mm from the reference plane.