Stent designs for reduced infolding of graft material

A stent-graft, comprising:

• a substantially tubular graft material;
• a first stent coupled to the graft material, the first stent having proximal and distal ends and further having compressed and deployed states, the proximal end being disposed proximally beyond a proximal edge of the graft material, and the distal end having at least one portion overlapping with the proximal edge of the graft material,
• where the first stent comprises at least one distal apex having a bifurcation extending into first and second leg regions;
• and
• a second stent disposed at a location overlapping the graft material, the second stent having a proximal apex that is positioned circumferentially between distal ends of the first and second leg regions in the deployed state.

A stent-graft, comprising:

• a substantially tubular graft material;
• and
• a first stent coupled to the graft material, the first stent comprising a generally zig-zag shape, and formed from a wire comprising a series of proximal apices disposed at the proximal end of the first stent, a series of distal apices disposed at the distal end of the first stent, and a plurality of first and second strut segments disposed between the series of proximal apices and the series of distal apices, where the proximal apices are disposed proximally beyond a proximal edge of the graft material, and the distal apices at least partially overlap with the proximal edge of the graft material;
• and
• an extension region extending from at least one strut segment, where the extension region comprises a proximal end that is secured to the at least one strut segment at a location between the proximal and distal apices, and where the extension region comprises a distal end that is circumferentially spaced apart from an adjacent distal apex in the deployed state.