Anti-Paravalvular Leakage Component for a Transcatheter Valve Prosthesis

Abstract

A transcatheter valve prosthesis includes an expandable tubular stent, a prosthetic valve within the stent, and an anti-paravalvular leakage component coupled to and encircling the stent which includes a plurality of self-expanding struts and an annular sealing membrane. Each strut has a first end coupled to a distal end of the stent and a second end not coupled to the stent. Each anti-paravalvular leakage component is moveable between a compressed configuration and a deployed configuration. In the compressed configuration, each strut extends distally away from the distal end of the stent. In the deployed configuration, each strut extends proximally away from the distal end of the stent. In an embodiment hereof, the deployed strut has a C-shape and is twisted such that the C-shape lies in a plane substantially along or tangential with the outer surface of the stent. In another embodiment hereof, the deployed strut is rolled-up and extends radially away from the outer surface of the stent.

1 - 15 . (canceled) 
     
     
         16 . A transcatheter valve prosthesis comprising:
 a tubular stent having a compressed configuration for delivery within a vasculature and an expanded configuration for deployment within a native heart valve;   a prosthetic valve component disposed within and secured to the stent; and   an anti-paravalvular leakage component coupled to and encircling an outer surface of the tubular stent, the anti-paravalvular leakage component including a plurality of self-expanding struts and an annular sealing membrane coupled to the struts, each strut having a first end coupled to a distal end of the tubular stent and a second end not coupled to the tubular stent, wherein the anti-paravalvular leakage component is moveable between a compressed configuration in which each strut extends distally away from the distal end of the stent and a deployed configuration in which each strut is rolled-up and extends radially away from the distal end of the stent.   
     
     
         17 . The transcatheter valve prosthesis of  claim 16 , wherein each strut extends generally parallel to a longitudinal axis of the stent when in the compressed configuration. 
     
     
         18 . The transcatheter valve prosthesis of  claim 16 , wherein the struts are spaced apart in approximately equal intervals around the tubular stent. 
     
     
         19 . The transcatheter valve prosthesis of  claim 16 , wherein each strut is rolled at least 360 degrees when in the deployed configuration. 
     
     
         20 . The transcatheter valve prosthesis of  claim 19 , wherein each strut is rolled more than two complete revolutions when in the deployed configuration.