US Patent 12064348 Multi-layer covering for a prosthetic heart valve

A prosthetic heart valve including a frame, leaflet structure, and sealing member disposed around an outer surface of the frame is disclosed. As one example, the sealing member includes a knitted fabric layer, the knitted fabric layer comprising a base layer forming an inner surface of the knitted fabric layer, where the base layer has a mesh-like structure. The knitted fabric layer further comprises a plush outer surface comprising a plurality of pile yarns knit into loops and that extend outward from the base layer.