| abstract |
In an unfolded state, a sheet defines a panel at a medial region, and tab portions disposed peripherally to the panel. A method comprises (A) sandwiching, between a first tab portion and a second tab portion, (i) a first commissural portion of a first leaflet, and (ii) a second commissural portion of a second leaflet; (B) attaching the first tab portion and the second tab portion to the sheet by stitching a first stitching through the tab portions and the commissural portions; (C) subsequently, covering the first stitching by: (i) forming the first tab portion into a first tab having an outer layer and an inner layer, and (ii) forming the second tab portion into a second tab having an outer layer and an inner layer; and (D) subsequently, stitching a second stitching through the outer and inner layers, and the commissural portions. Other embodiments are also described. |