Which EMC (electromagnetic compatibility) components are helpful for the design and modification of portable electrocardiographs?

Portable ECGs require high EMC performance within a compact space. The lead input front-end must use a highly integrated ECG analog front-end chip (AFE), which typically integrates right leg drive, high-frequency filtering, and lead detachment detection for interference immunity. The PCB should be at least four layers thick, providing a complete ground plane. Power management must be efficient and low-noise, using a low-noise LDO to power the analog section. If Bluetooth is included, its antenna should be kept away from the analog circuitry and shielded. The device housing should be made of non-conductive material to avoid ground loops; immunity should be improved through optimized circuit design rather than relying on housing shielding. Advanced digital filtering algorithms should be used in the software to remove power frequency and other interference.