A device for transcatheter gathering of tissue of a heart valve leaflet may include an elongated tube extending in a longitudinal direction and a capture tool moveable in the elongated tube between a retracted position and an extended position. The elongated tube may have at least one slot extending generally in the longitudinal direction from a distal end of the elongated tube. The at least one slot may have an open end at the distal end of the elongated tube and a closed end remote therefrom. The capture tool may be operable to gather tissue of the heart valve leaflet into the at least one slot. The gathered tissue may have a pleated configuration.