What causes baseline wander?

Baseline wander is a commonly seen noise in ECG recordings and can be caused by respiration, changes in electrode impedance, and motion. Baseline wander can mask important information from the ECG, and if it is not properly removed, crucial diagnostic information contained in the ECG will be lost or corrupted.

What is baseline drift in ECG?

Baseline drift in ECG signal is the biggest hurdle in visualization of correct waveform and computerized detection of wave complexes based on threshold decision. The baseline drift may be linear, static, non- linear or wavering.

What is concept of signal processing?

Signal processing consists of mapping or transforming information bearing signals into another form of signals at the output, aiming at some application benefits. This mapping defines a continuous or analog system if it involves functions representing the input and output signals.

What are the steps in signal processing?

3.1 Digital Signal Processing

1. 1 Sampling. The audio data we wish to treat will generally be present in the form of electric oscillations.
2. 2 Power and Energy.
3. 3 Fourier Transform.
4. 4 Convolution, Filtering and Linear Systems.
5. 5 Windowing.

What prevents baseline wandering?

Line coding technique to eliminate baseline wandering In the first half, voltage is at one level and in the second half it is at the other level. Transition at the center of bit period helps in synchronization. Differential Manchester encoding combines RZ and NRZ-I. There is transition at the center of the bit period.

How do you fix a wandering baseline?

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.

What is baseline wandering problem?

Value of data element at the receiver is determined against this baseline reference. If there are long string of ones and zeros in the data, it drifts baseline and makes it tough for the receiver to decode the data correctly. This drift in the baseline is known as “baseline wandering”.

What is ECG signal?

The electrocardiogram (ECG) signal reflects the electrical activity of the heart observed from the strategic points of the human body and represented by quasi-periodic voltage signal.

Which of the following problems can cause wandering baseline on the ECG tracing?

It can be caused by patient movement, including breathing. I have also noticed that stopping or accelerating the ambulance can cause wandering baseline. Some references suggest that wandering baseline can be caused by loose or dry electrodes.