Prosthetic heart valve

Apparatus, comprising:

• a valve body that:
• is tubular,
• has an upstream end, a downstream end, and a central longitudinal axis, and
• defines a lumen along the central longitudinal axis;
• and
• a plurality of prosthetic leaflets, disposed within the lumen, and configured to facilitate one-way movement of fluid through the lumen in an upstream-to-downstream direction, wherein:
• the tubular valve body has a cellular structure defined by a plurality of joists connected at a plurality of nodes, the joists and nodes delimiting cells of the cellular structure, the plurality of nodes including minor nodes at which 2-4 joists are connected, and major nodes at which 6-8 joists are connected,
• the cells of the cellular structure comprise a first circumferential row of first-row cells, each of the first-row cells (i) being connected to each of its circumferentially-adjacent first-row cells at a respective one of the major nodes, and (ii) being longitudinally delimited by two of the minor nodes,
• the cellular structure further comprises a second circumferential row of second-row cells, each of the second-row cells (i) being connected to each of its circumferentially-adjacent second-row cells at a respective one of the major nodes, and (ii) being longitudinally delimited by at least one of the major nodes, and
• the second circumferential row is rotationally offset with respect to the first circumferential row, such that the second-row cells are rotationally staggered with respect to the first-row cells.