CPC A61F 2/2418 (2013.01) [A61F 2/2412 (2013.01); A61F 2/2433 (2013.01); A61F 2/2475 (2013.01); A61F 2/95 (2013.01); B05B 1/185 (2013.01); E03C 1/025 (2013.01); E03C 1/066 (2013.01); A61F 2/9522 (2020.05); A61F 2220/005 (2013.01); A61F 2220/0033 (2013.01); A61F 2220/0075 (2013.01); A61F 2230/0054 (2013.01); Y10T 29/49863 (2015.01)] | 20 Claims |
1. A prosthetic heart valve comprising:
a radially collapsible and expandable annular frame, the frame having at least three circumferentially extending rows of angled struts arranged in a zig-zag pattern in each row, the at least three rows including a first row of angled struts defining an inflow end of the frame, a second row of angled struts defining an outflow end of the frame, a third row of angled struts positioned axially between the first and second rows of angled struts along a length of the frame;
wherein the frame comprises a circumferentially extending, upper row of closed cells defined between the second and third rows of angled struts, the cells defining openings in the frame;
wherein the frame comprises three commissure attachment posts;
a leaflet structure comprising three separate leaflets, wherein each leaflet comprises pericardial tissue, each leaflet having an upper edge portion, a curved lower edge portion and two side flaps, wherein each side flap has a height that is less than an overall height of the leaflet in a flattened state of the leaflet prior to assembly of the leaflet structure, wherein the curved lower edge portion extends from the lower end of one of the side flaps to the lower end of the other side flap, and wherein each side flap is connected to an adjacent side flap of another leaflet to form commissures of the leaflet structure, each commissure being attached to the frame;
wherein each commissure is connected to one of the commissure attachment posts with sutures extending through apertures in the commissure attachment posts only at locations along the commissure attachment posts between the outflow end of the frame and an upstream end of the upper row of closed cells;
an annular inner sleeve comprising three U-shaped portions positioned along the curved lower edge portions of the leaflets, wherein the inner sleeve is a separate piece of material from the leaflets and wherein each leaflet is sutured to the inner sleeve along the curved lower edge portion; and
an annular outer sleeve extending around an outer surface of the frame, wherein the outer sleeve is made of pericardium.
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