A device for treating a bifurcated body lumen, the device comprising: a first delivery catheter comprising a first elongate shaft with a proximal end and a distal end, a first expandable member adjacent the distal end of the first elongate shaft, and a first radially expandable stent disposed over the first expandable member, the first stent having a first portion and a second portion, the first stent non-uniformly crimped to the first expandable member such that the second portion remains uncrimped to the first expandable member over a sector of the first expandable member, wherein the first stent comprises a proximal portion having a proximal opening, a distal portion having a distal opening, and a sidewall having a side hole therethrough and a plurality of apertures through the sidewall, the side hole being disposed between the proximal and distal portions, wherein the first stent has a collapsed configuration and an expanded configuration, in the collapsed configuration the first stent is coupled with the first expandable member, and in the expanded configuration the first stent supports a vessel wall; and a second delivery catheter comprising a second elongate shaft with a proximal end and a distal end, a second expandable member adjacent the distal end of the second elongate shaft (13 2), and a second radially expandable stent disposed over the second expandable member, the second radially expandable stent uniformly crimped to the second expandable member, wherein the second stent has a collapsed configuration and an expanded configuration, in the collapsed configuration the second stent is uniformly crimped to the second expandable member, and in the expanded configuration the second stent is configured to support a vessel wall, wherein the second elongate shaft extends through the proximal opening of the first stent and exits the first stent through the side hole when the first stent is in the collapsed configuration, and wherein the proximal portion of the first stent, in the collapsed configuration, is non-uniformly crimped to the first expandable member, and wherein the first expandable member at least partially protrudes through the plurality of apertures in the sidewall of the first stent, the second elongate shaft being proximally retractable relative to the first expandable member and the first stent in the collapsed configuration so as to pass through an annular passage of the first stent and the side hole for expansion of the proximal portion of the first stent from the collapsed configuration. a first delivery catheter comprising a first elongate shaft with a proximal end and a distal end, a first expandable member adjacent the distal end of the first elongate shaft, and a first radially expandable stent disposed over the first expandable member, the first stent having a first portion and a second portion, the first stent non-uniformly crimped to the first expandable member such that the second portion remains uncrimped to the first expandable member over a sector of the first expandable member, wherein the first stent comprises a proximal portion having a proximal opening, a distal portion having a distal opening, and a sidewall having a side hole therethrough and a plurality of apertures through the sidewall, the side hole being disposed between the proximal and distal portions, wherein the first stent has a collapsed configuration and an expanded configuration, in the collapsed configuration the first stent is coupled with the first expandable member, and in the expanded configuration the first stent supports a vessel wall; and a second delivery catheter comprising a second elongate shaft with a proximal end and a distal end, a second expandable member adjacent the distal end of the second elongate shaft (13 2), and a second radially expandable stent disposed over the second expandable member, the second radially expandable stent uniformly crimped to the second expandable member, wherein the second stent has a collapsed configuration and an expanded configuration, in the collapsed configuration the second stent is uniformly crimped to the second expandable member, and in the expanded configuration the second stent is configured to support a vessel wall, wherein the second elongate shaft extends through the proximal opening of the first stent and exits the first stent through the side hole when the first stent is in the collapsed configuration, and wherein the proximal portion of the first stent, in the collapsed configuration, is non-uniformly crimped to the first expandable member, and wherein the first expandable member at least partially protrudes through the plurality of apertures in the sidewall of the first stent, the second elongate shaft being proximally retractable relative to the first expandable member and the first stent in the collapsed configuration so as to pass through an annular passage of the first stent and the side hole for expansion of the proximal portion of the first stent from the collapsed configuration.