Devices for and methods of closing a patent foramen ovale (PFO), thus reducing or eliminating blood flow through the defect The device is formed from a tubular structure having split ends, such that, after insertion, struts defined by the split ends pivot in a radial direction away from the tube, thereby securing the device within the septal defect. Methods include inserting the device as a tubular structure into the PFO and causing the struts to extend radially away from the central axis of the device.