Abstract: A tissue anchor includes a tissue-engaging element, a head, and a protrusion. The tissue-engaging element has a sharpened distal tip, and is configured to be driven into tissue of a subject. The head is coupled to a proximal end of the tissue-engaging element, and includes a driver interface that is configured to be reversibly engaged by an anchor driver. The protrusion protrudes away from the head such that driving the tissue-engaging element into the tissue presses the protrusion against the tissue, and is configured to move with respect to the head automatically in response to being pressed against the tissue. Other embodiments are also described.

Abstract: A catheter device includes a tube that has a distal opening that is configured to be transluminally advanced into the subject; and an extracorporeal unit that is coupled to a proximal end of the tube. A series of cartridges is arranged along the extracorporeal unit, each of the cartridges having an initial position in which the cartridge holds a respective anchor. Each of the cartridges is, moveable from the initial position to a deployment position while remaining coupled to the extracorporeal unit. A driver is configured to, for each of the anchors, sequentially, while the respective cartridge is in the deployment position, move the anchor out of the respective cartridge and through the tube toward the distal opening. Other embodiments are also described.

Abstract: Apparatus comprising a tissue anchor for use with an anchor driver. The anchor comprises a head, and a tissue-engaging element coupled to a proximal end of the head. The tissue-engaging element defines a central longitudinal axis of the anchor, and has a sharpened distal tip, configured to be driven into tissue of a subject. The head comprises a driver interface, configured to be reversibly engaged by the anchor driver, and an eyelet, disposed laterally from the central longitudinal axis, defining an aperture on an aperture plane, the aperture having a length along a long axis of the aperture and a width along a short axis of the aperture, the long axis and the short axis disposed on the aperture plane. The eyelet is mounted such that the aperture plane is slanted at a fixed angle with respect to the central longitudinal axis. Other applications are also described.

Abstract: Apparatus comprising a tissue anchor for use with an anchor driver. The anchor comprises a head, and a tissue-engaging element coupled to a proximal end of the head. The tissue-engaging element defines a central longitudinal axis of the anchor, and has a sharpened distal tip, configured to be driven into tissue of a subject. The head comprises a driver interface, configured to be reversibly engaged by the anchor driver, and an eyelet, disposed laterally from the central longitudinal axis, defining an aperture on an aperture plane, the aperture having a length along a long axis of the aperture and a width along a short axis of the aperture, the long axis and the short axis disposed on the aperture plane. The eyelet is mounted such that the aperture plane is slanted at a fixed angle with respect to the central longitudinal axis. Other applications are also described.