Removing baseline drift from ECG signal

1. How do I get rid of baseline drift?
2. How baseline wandering of ECG signal can be removed?
3. How does wandering baseline become corrected?
4. What causes baseline drift ECG?

How do I get rid of baseline drift?

Baseline wander is a low-frequency noise of around 0.5 to 0.6 Hz. To remove it, a high-pass filter of cut-off frequency 0.5 to 0.6 Hz can be used. Powerline interference (50 or 60 Hz noise from mains supply) can be removed by using a notch filter of 50 or 60 Hz cut-off frequency.

How baseline wandering of ECG signal can be removed?

BW removal is an important step in processing of ECG signals because BW makes interpretation of ECG recordings difficult. The main cause of the BW in the ECG signal is movement and respiration of the patient [2]. One of the approaches to remove BW artefacts is the high-pass filtering of ECG signals [2].

How does wandering baseline become corrected?

Baseline drift is low frequency noise between 0.5 Hz and 0.6 Hz. To remove it, you can use a highpass filter with a cutoff frequency of 0.5 Hz to 0.6 Hz. Interference from the mains (50 Hz or 60 Hz noise from mains supply) can be removed using a notch filter with a cut off frequency 50 Hz or 60 Hz.

What causes baseline drift ECG?

Baseline wander is a commonly seen noise in ECG recordings and can be caused by respiration, changes in electrode impedance, and motion.