REPLACEMENT HEART VALVES AND METHODS OF DELIVERY

摘要

A valve prosthesis can be configured to be deployed within a native heart valve and prevent axial flow of fluid around an exterior of the prosthesis. The prosthesis can include an expandable frame configured to radially expand and contract for deployment within the native heart valve, a flap assembly positioned around an exterior of the expandable frame, a proximal end of the flap assembly being positioned at or proximate a proximal end of the expandable frame. In some embodiments, the flap assembly can extend outward from the frame and have an expanded configuration configured to create a barrier to fluid flow exterior to the frame when deployed within the native heart valve.

主权项

1. A valve prosthesis configured to be deployed within a native heart valve, the valve prosthesis comprising:
an expandable frame comprising a proximal end, a distal end and a longitudinal axis extending therethrough, the frame configured to collapse radially for delivery and to expand radially upon deployment; a distal anchoring feature extending from the frame and expandable from a collapsed configuration to an expanded configuration; a valve body positioned within an interior of the expandable frame, wherein the valve body comprises a plurality of leaflets configured to allow flow in a first direction and prevent flow in a second opposite direction; a flap assembly positioned around and secured to an exterior of the expandable frame; and at least one biasing arm extending radially outward from the frame when the frame is in an expanded configuration, the at least one biasing arm being configured to bias the flap assembly radially outward from the longitudinal axis of the frame to provide a space between the flap assembly and the valve body; wherein fluid flow into the space causes the flap assembly to move from a first configuration to a second configuration configured to create a barrier to fluid flow exterior to the frame when the valve prosthesis is deployed within the native heart valve.