Abstract: The present technology is generally directed to medical implants, such as stimulation assemblies for stimulating the septal wall of the heart of a human patent, and associated methods. In some embodiments, a stimulation assembly includes a body, circuitry positioned at least partially within the body, an electrode, and an anchor coupled to the body. The anchor can be secured to the septal wall such that the body is positioned within the left ventricle of the heart and the electrode engages tissue of the septal wall. The circuitry can be configured to receive acoustic energy and to convert the acoustic energy to electrical energy, and the electrode can deliver the electrical energy to the tissue of the septal wall to stimulate the tissue.