| 主权项 |
1. A prosthetic heart valve configured to be expanded between native leaflets of a native aortic annulus of a patient, the prosthetic heart valve comprising:
a collapsible and expandable stent having a proximal end, a distal end, an annulus section adjacent the proximal end, and an aortic section adjacent the distal end, the stent including a plurality of struts shaped to form a plurality of cells connected to one another in a plurality of annular rows around the stent, the stent defining a flow direction from the proximal end toward the distal end, the stent having a minimum diameter in a direction perpendicular to the flow direction and a length in the flow direction between the proximal and distal ends when the stent is in an expanded use condition, the length being greater than the minimum diameter; a cuff attached to the annulus section of the stent, the cuff having top and bottom edges and occupying a first group of the cells, such that the cells above the top edge are open cells at least partially devoid of the cuff, the cuff having a landing zone extending at least one-third of the length of the stent in the flow direction between the bottom edge of the cuff and a proximal end of a most proximal cell of the open cells when the stent is in the expanded use condition; and a plurality of prosthetic valve leaflets attached to the cuff between a first location and a second location distal to the first location in the flow direction, each of the prosthetic valve leaflets having a free edge. |
