A biocompatible and biodegradable construct having a base expandable member and an integral, internal support structure. The support structure is preferably formed from poly(glycerol sebacate) (PGS) or a magnesium alloy. The base member is preferably formed from acellular extracellular matrix (ECM) derived from small intestine submucosa (SIS) tissue that exhibits a flexible, porous, sponge-like structure adapted to expand upon absorption of a bodily fluid, wherein the construct seals a perivalvular leak when disposed proximate thereto.