An occlusive implant, comprising: an expandable framework (12; 12'; 112; 212) including a plurality of support members defining a proximal end region (11; 111; 211) of the expandable framework (12, 12'; 112; 212) and a height that is a distance between the proximal end region (11; 111; 211) and a distal end region (13; 113; 213) of the expandable framework (12, 12'; 112; 212); a central hub member (23; 123; 232) attached to the plurality of support members; wherein the plurality of support members includes one or more curved portions, which are shaped such that they define a central recessed region; wherein the central hub member (23; 123; 232) is positioned within the central recessed region; wherein the central recessed region extends into the expandable framework (12, 12'; 112; 212) a first distance; wherein the expandable framework (12, 12'; 112; 212) is configured to shift between a first expanded configuration and a second collapsed configuration, wherein the first distance increases as the expandable framework (12; 12'; 112; 212) shifts between the first expanded configuration and the second collapsed configuration such that the height of the expandable framework (12, 12'; 112; 212) remains the same in both the first configuration and the second configuration; wherein the central hub member (23; 123; 232) is configured to shift relative to the proximal end region (11; 111; 211) while the expandable framework (12, 12'; 112; 212) shifts between the first configuration and the second configuration; wherein the plurality of support members is configured to bend radially inward and upward toward the distal end region (13; 113; 213) when shifting between the first expanded configuration and the second configuration; wherein the expandable framework (12, 12'; 112; 212) has a first width in the first configuration and a second width (Y2, Y3) in the second configuration, wherein the first width is wider than the second width (Y2, Y3); and wherein the central recess region of the expandable framework (12, 12'; 112; 212) has a first recess height in the first configuration and a second recess height (Z2, Z3) in the second configuration, and wherein the second recess height (Z2, Z3) is greater than the first recess height. an expandable framework (12; 12'; 112; 212) including a plurality of support members defining a proximal end region (11; 111; 211) of the expandable framework (12, 12'; 112; 212) and a height that is a distance between the proximal end region (11; 111; 211) and a distal end region (13; 113; 213) of the expandable framework (12, 12'; 112; 212); a central hub member (23; 123; 232) attached to the plurality of support members; wherein the plurality of support members includes one or more curved portions, which are shaped such that they define a central recessed region; wherein the central hub member (23; 123; 232) is positioned within the central recessed region; wherein the central recessed region extends into the expandable framework (12, 12'; 112; 212) a first distance; wherein the expandable framework (12, 12'; 112; 212) is configured to shift between a first expanded configuration and a second collapsed configuration, wherein the first distance increases as the expandable framework (12; 12'; 112; 212) shifts between the first expanded configuration and the second collapsed configuration such that the height of the expandable framework (12, 12'; 112; 212) remains the same in both the first configuration and the second configuration; wherein the central hub member (23; 123; 232) is configured to shift relative to the proximal end region (11; 111; 211) while the expandable framework (12, 12'; 112; 212) shifts between the first configuration and the second configuration; wherein the plurality of support members is configured to bend radially inward and upward toward the distal end region (13; 113; 213) when shifting between the first expanded configuration and the second configuration; wherein the expandable framework (12, 12'; 112; 212) has a first width in the first configuration and a second width (Y2, Y3) in the second configuration, wherein the first width is wider than the second width (Y2, Y3); and wherein the central recess region of the expandable framework (12, 12'; 112; 212) has a first recess height in the first configuration and a second recess height (Z2, Z3) in the second configuration, and wherein the second recess height (Z2, Z3) is greater than the first recess height.