Replacement heart valve prosthesis

A replacement heart valve prosthesis for deployment at a native heart valve, the prosthesis comprising:

• an expandable frame configured to radially expand and contract for deployment within a native heart valve, the expandable frame comprising:
• a frame body comprising a proximal region, a distal region, and an intermediate region extending between the proximal and distal regions, the frame body comprising a first row of struts and a second row of struts;
• a supplemental frame comprising a first row of struts configured to be generally aligned along the first row of struts of the frame body, the first row of struts of the supplemental frame having a shape which generally matches the shape of the first row of struts of the frame body;
• a proximal anchoring feature, the proximal anchoring feature sized to be positioned on a first side of an annulus of the native heart valve;
• and
• a distal anchoring feature, the distal anchoring feature sized to be positioned on a second side of an annulus of the native heart valve;
• and
• a valve body positioned within an interior of the expandable frame, the valve body comprising a plurality of leaflets configured to allow flow in a first direction and prevent flow in a second opposite direction.