Systems, devices, and methods for tracking and determining the motion of a cardiac implant is disclosed. The motion of the implant is determined by transmitting acoustic energy to a tissue location using an acoustic controller-transmitter comprising an array of acoustic transducers； wherein the implant is configured to convert the transmitted acoustic energy to electrical energy； and the tracking is achieved by determining the electrical energy delivered to the tissue throughout one or more cardiac cycles in order to create a motion profile of the cardiac implant.
