A device for treating cardiac valve stenoses, said device comprising: a shaft having proximal and distal ends; a radially expansible shell carried on a distal region of the shaft, wherein the expansible shell has a length and inflates to an expanded diameter; and an elastic metal cage mounted over the expansible shell such that the elastic metal cage radially expands with the expansible shell; wherein the elastic metal cage comprises a plurality of hexagonal cells which extend over the middle of the expansible shell when inflated; wherein the hexagonal cells comprise a plurality of axially aligned scoring elements being axial struts, a proximal zig zag ring, and a distal zig zag ring; wherein each hexagonal cell has a proximal connection point on the proximal zig zag ring and a distal connection point on the distal zig zag ring, and where the axial struts extend between said connection points; wherein the elastic metal cage further comprises proximal connector links and distal connector links, wherein the proximal connector links are coupled to the axially elongated hexagonal cells via the proximal zig zag ring and the proximal connection points, and the distal connector links are coupled to the axially elongated hexagonal cells via the distal zig zag ring and the distal connection points and secure the cage to the shaft; and a compliance tube between the proximal connector links and the shaft, wherein the compliance tube is adapted to accommodate axial elongation and circumferential rotation of the elastic metal cage structure; and wherein the proximal connector links are coupled to the compliance tube via a proximal collar; and wherein said scoring elements have flat radially outward surfaces. a shaft having proximal and distal ends; a radially expansible shell carried on a distal region of the shaft, wherein the expansible shell has a length and inflates to an expanded diameter; and an elastic metal cage mounted over the expansible shell such that the elastic metal cage radially expands with the expansible shell; wherein the elastic metal cage comprises a plurality of hexagonal cells which extend over the middle of the expansible shell when inflated; wherein the hexagonal cells comprise a plurality of axially aligned scoring elements being axial struts, a proximal zig zag ring, and a distal zig zag ring; wherein each hexagonal cell has a proximal connection point on the proximal zig zag ring and a distal connection point on the distal zig zag ring, and where the axial struts extend between said connection points; wherein the elastic metal cage further comprises proximal connector links and distal connector links, wherein the proximal connector links are coupled to the axially elongated hexagonal cells via the proximal zig zag ring and the proximal connection points, and the distal connector links are coupled to the axially elongated hexagonal cells via the distal zig zag ring and the distal connection points and secure the cage to the shaft; and a compliance tube between the proximal connector links and the shaft, wherein the compliance tube is adapted to accommodate axial elongation and circumferential rotation of the elastic metal cage structure; and wherein the proximal connector links are coupled to the compliance tube via a proximal collar; and wherein said scoring elements have flat radially outward surfaces.