Devices for transcatheter prosthetic heart valve implantation and access closure

Apparatus for closing an aperture through a wall of a patient's circulatory system comprising:

• a structure that is collapsible for delivery into the patient and part way through the aperture via a tube, the structure being at least partly resiliently biased to expand radially outwardly relative to the aperture when released from confinement by the tube, the structure including a first portion that is resiliently biased to expand radially outwardly relative to the aperture inside the circulatory system, a second portion that is resiliently biased to expand radially outwardly relative to the aperture outside the circulatory system, and a third portion that connects the first and second portions and that is configured for disposition in the aperture.