If the interference of the 60Hz power line is present determ

If the interference of the 60Hz power line is present, determine which one(s) of the following measurements need a 60Hz notch filter for the signal processing. Please give clear explanations.

(1) ECG

(2) EEG

(3) EMG

Solution

ANSWER is ECG

Any residual power Line interference may interfere with the correct delineation of ECG wave boundaries and corrupt the proper function of automatic ECG analysis. The interference can also disturb the correct measurement of RR intervals, which is the basis for heart rate variability analysis.