Hydrophilic skirt for paravalvular leak mitigation and fit and apposition optimization for prosthetic heart valve implants

A device for expanded implantation into a patient's heart chamber, the device comprising:

• an expandable anchoring structure comprising:
• an expandable stent defining:
• an upper portion;
• and
• a base section having an outer surface;
• and
• a valve support integrally formed from the base section and disposed entirely within the base section and comprising an inner surface and an outer surface, wherein at least one prosthetic valve is attached to the inner surface of the valve support;
• and
• a skirt operatively attached to a portion of the outer surface of the base section;
• wherein:
• the upper portion of the expandable stent comprises open cells;
• a bottom portion of the skirt comprises two layers of material, the two layers of material comprising an inner layer attached to the outer surface of the base section and an outer layer;
• sub-pockets are defined between the two layers of material;
• hydrophilic material is disposed within at least one sub-pocket;
• a reserve pocket is disposed on the skirt and spaced apart from the sub-pockets;
• the reserve pocket comprises a ring of material around a circumference of the skirt;
• and
• hydrophilic material is disposed within the reserve pocket.