US Patent 12023503 ECG belt systems to interoperate with IMDs

An electrode apparatus includes a portable amplifier and a plurality of external electrodes to be disposed proximate a patient's skin. A portable computing apparatus is operably coupled to the electrode apparatus. The portable computing apparatus is configured to monitor electrical activity from tissue of a patient using the plurality of external electrodes to generate a plurality of electrical signals over time. The portable computing apparatus is configured to perform at least one of optimizing at least one parameter of the of the implantable pacing device based on the plurality of electrical signals and determining cardiac synchrony based on the plurality of electrical signals.