A Transcatheter Aortic Valve device comprises a proximal ring which is of zig-zag design pattern provides an anchorage for the transcatheter aortic valve device at the targeted location, and a distal ring comparatively larger in size than the proximal ring provides an additional anchorage for the transcatheter aorti...

The invention relates to a stent graft device that includes a tubular body having a proximal end, a distal end and a middle region. The proximal end of the tubular body in particular would require rings that would need to be placed in such a manner that it affixes firmly to the vessel wall for a good seal so as to p...