help in ecg signal analysis

will someone be able to help me in analysing the ecg signal that have been already given, i actually wanna remove wanna remove the baseline wander in the signal, i am working on matlab for the first time that is why? A few of the figures have been uploaded below

Hi,

To remove baseline wander in any signals you have two options.

1. Use Fourier methods with fft.

2. Use the filter command. ( refer matlab help on filter).

When doing ECG analysis , also be specific what all things you need to analyse.

Best wishes

thank you AKA07 for helping me out, the thing is like i am donw ith the removal of baseline wander as well as the powerline interference, i wanted help on how to start with QRS detection, cuz the whole point is it find the arrhytmia and S-T shift in the ecg wave..hope u could help me out..thanx in advance

Hi,

To do detect QRS complexes in EEG , the first thing you should do is to identify the most prominent complex of ECG. And thats " R -peak". Once you have identified the R peak , the rest would be easy , because Q and S do have some relation with R. If you have read the basic stuff regarding ECG then you would find it easy.
For eg. the voltage measurements of Q and S is less than R by some factor. Say Q is 1/4th of R something like that ( not actual, but you can figure it ).

So the first thing is to identify R. Since ECG is periodic, you can specify a window of a specific size ( depending on the sampling rate of the signal) to move between certain intervals and find the maximum value of voltage in a particular frame, which would be your R peak.

The other way would be using wavelets. You should have got an idea by now , I think so.