An Implantable Epicardial Biopotential Monitoring System with Wireless Data and Power Telemetry

We have developed an implantable biopotential monitoring system-on-board (SoB) for electrocardiographic sensing, with performance validated through ECG signal simulator test. The integrated system incorporates BLE 5.0 wireless communication, enabling real-time graphical signal visualization through a dedicated PC interface. To improve patient comfort and minimize surgical interventions, a wireless charging module is implemented to eliminate the need for battery replacement procedures. The prototype demonstrates miniaturization, achieving complete system integration within a circular form factor of 14 mm radius (equivalent to 615 mm2 footprint) with a total component-inclusive profile thickness of 2.67 mm. Electrical characterization reveals an operational current consumption of approximately 90 mA during active mode with Bluetooth communication, while maintaining a maximum unobstructed transmission range of 4.5 meters under free-space conditions.In the electromagnetic safety simulation of the implanted device, we model the implanted device and evaluate the radiation of the antenna inside.The results are in line with the ICNIRP standard.