A stent-graft prosthesis comprising: a tubular graft; a first wire (104, 504) bent into a first waveform and spirally wrapped into a first helix having a plurality of windings (118, 518) that form a hollow cylindrical shape, the first wire (104, 504) having opposing first and second ends (106, 506, 108, 508) and a midportion extending therebetween, wherein the first wire (104, 504) is coupled to the tubular graft; a second wire (124, 524) bent into a second waveform and spirally wrapped into a second helix having a plurality of windings (138, 538) that form a hollow cylindrical shape, the second wire (124, 524) having opposing first and second ends (126, 526, 128, 528) and a midportion extending therebetween, wherein the second wire (124, 524) is coupled to the tubular graft, and wherein the first and second wires (104, 504, 124, 524) are disposed relative to each other such that the plurality of windings (118, 518) of the first wire (104, 504) and the plurality of windings (138, 538) of the second wire (124, 524) are disposed about a common longitudinal axis and the plurality of windings (118, 518) of the first wire (104, 504) and the plurality of windings (138, 538) of the second wire (124, 524) are axially offset from each other, with windings of the plurality of windings (118, 518) of the first wire (104, 504) interwoven between windings of the plurality of windings (138, 538) of the second wire (124, 524) along a length of the stent-graft prosthesis, and wherein the first and second wires (104, 504, 124, 524) are not coupled to each other along at least the midportions (110, 130) thereof except through the tubular graft. a tubular graft; a first wire (104, 504) bent into a first waveform and spirally wrapped into a first helix having a plurality of windings (118, 518) that form a hollow cylindrical shape, the first wire (104, 504) having opposing first and second ends (106, 506, 108, 508) and a midportion extending therebetween, wherein the first wire (104, 504) is coupled to the tubular graft; a second wire (124, 524) bent into a second waveform and spirally wrapped into a second helix having a plurality of windings (138, 538) that form a hollow cylindrical shape, the second wire (124, 524) having opposing first and second ends (126, 526, 128, 528) and a midportion extending therebetween, wherein the second wire (124, 524) is coupled to the tubular graft, and wherein the first and second wires (104, 504, 124, 524) are disposed relative to each other such that the plurality of windings (118, 518) of the first wire (104, 504) and the plurality of windings (138, 538) of the second wire (124, 524) are disposed about a common longitudinal axis and the plurality of windings (118, 518) of the first wire (104, 504) and the plurality of windings (138, 538) of the second wire (124, 524) are axially offset from each other, with windings of the plurality of windings (118, 518) of the first wire (104, 504) interwoven between windings of the plurality of windings (138, 538) of the second wire (124, 524) along a length of the stent-graft prosthesis, and wherein the first and second wires (104, 504, 124, 524) are not coupled to each other along at least the midportions (110, 130) thereof except through the tubular graft.