Transcatheter valve stent anchors

摘要

A stent for use in a prosthetic heart valve has a plurality of expandable and collapsible closed cells, a portion of which form an annulus section adapted for placement within the annulus of the native heart valve. Anchor features of the stent residing within at least some closed cells are adapted to engage tissue of the heart, including native valve leaflets, the sinotubular junction, or another implanted device when the prosthetic valve is implanted in the heart. The anchor features may help to retain the prosthetic valve in position, without interfering with the opening and closing of the valve leaflets. Furthermore, the anchor features may be configured to allow the stent to be resheathed into a delivery device after the portion of the stent with the anchor feature has expanded out of the delivery device.

主权项

1. A stent for use with a prosthetic heart valve for replacement of a native valve, the stent comprising:
an expandable stent body having a collapsed configuration and an expanded configuration, the stent body including a plurality of struts forming a plurality of closed cells, and at least one anchor feature formed integrally with the stent body, the anchor feature having a first end coupled to a first portion of one of the closed cells and a second end coupled to a second portion of the one closed cell so that no portion of the anchor feature overlaps in a radial direction of the stent body with any of the struts forming the plurality of closed cells, the anchor feature further including an engagement portion adapted to engage a surface in the heart, wherein in the expanded configuration of the stent body the first end and the second end of the anchor feature are spaced apart by a first distance and in the collapsed configuration of the stent body the first end and the second end of the anchor feature are spaced apart by a second distance less than the first distance.