An implantable prosthetic device includes a coaption portion, paddles, and clasps. The paddles having an outer portion and inner portion. The paddles are extendable from a folded closed position to an open position. A clasp is attached to each of the paddles. The clasps have a fixed arm attached to the inner portion of the paddle and a hoop-shaped moveable arm having a barbed portion. A hinge portion connects the fixed arm to the moveable arm.