Devices and systems for docking a heart valve

A valve assembly for implantation in a right ventricular outflow tract, the valve assembly comprising a frame having a substantially hourglass shape with a narrow portion in between a proximal end portion and a distal end portion, and a prosthetic valve secured to the frame in the narrow portion, the frame comprising:

• a plurality of struts that define a repeating pattern of cells, wherein the repeating pattern of cells comprises:
• a column of exactly three generally diamond shaped cells positioned in end-to-end alignment;
• a column of exactly two generally diamond shaped cells positioned in end-to-end alignment;
• wherein the proximal end portion and the distal end portion are configured to expand radially outward to contact a right ventricular outflow tract;
• wherein the distal end portion includes a first convex sealing portion for sealing engagement with an inner surface of the right ventricular outflow tract;
• wherein the proximal end portion includes a flared retaining portion configured to engage the inner surface of the right ventricular outflow tract at an angle between 30° and 60°;
• and
• wherein the proximal end portion includes a second convex sealing portion axially disposed between the narrow waist portion and the flared retaining portion.

A system comprising:

• a catheter including a sleeve;
• an expandable stent for implantation in a right ventricular outflow tract, wherein the expandable stent is disposed in the sleeve, the expandable stent comprising:
• a frame including a plurality of struts that define a repeating pattern of cells, wherein the repeating pattern of cells comprises:
• a column of exactly three generally diamond shaped cells positioned in end-to-end alignment;
• a column of exactly two generally diamond shaped cells positioned in end-to-end alignment;
• wherein the frame has a substantially hourglass shape with a narrow portion in between a proximal end portion and a distal end portion;
• wherein the proximal end portion and the distal end portion are configured to expand radially outward to contact a right ventricular outflow tract;
• wherein the distal end portion includes a first convex sealing portion for sealing engagement with an inner surface of the right ventricular outflow tract;
• wherein the proximal end portion includes a flared retaining portion configured to engage the inner surface of the right ventricular outflow tract at an angle between 30° and 60°;
• and
• wherein the proximal end portion includes a second convex sealing portion axially disposed between the narrow waist portion and the flared retaining portion.