A left atrial appendage occlusion medical device includes a carrier and a hydrogel polymer. The carrier is for placement within a left atrial appendage of a heart. The carrier can be a spherical shaped structure of a shape memory material or a framing coil of metal material, among other possible examples. The hydrogel polymer is carried by the carrier and hence is placed within the left atrial appendage along with the carrier. The hydrogel polymer is capable of expanding in size when the hydrogel polymer comes into contact with blood fluid. In use, upon placement of the left atrial appendage occlusion medical device within the left atrial appendage, the hydrogel polymer expands in size when it comes into contact with blood fluid.
