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I'm doing a project in T-wave extraction from ECG signal. Initially I completed the preprocessing steps like noise removal and baseline drift cancellation. Then I need to extract T wave using discrete wavelet transform. I tried different wavelets for different level in wavelet, but I'm not able to extract the T wave.

Can you help me with MATLAB coding?

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    $\begingroup$ MATLAB programming questions are more appropriate for Stack Overflow. Even then, your question does not contain enough information for anyone to be able to help you. I suggest you move the question to Stack Overflow, provide references to the literature you are using, and show what you have tried so far. $\endgroup$ – Phonon Dec 23 '11 at 14:42
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First, this is not an easy task to automate. An algorithm that works great on clean ECGs can fail miserably on noisy ones. That said, I would suggest you look at the approach used to identify the ST segments in the Long Term ST Database. It is one of, if not the, largest ST segment database publicly available. They describe the approach they used, which includes automatic segmentation followed by expert review.

Also, take a look at the PhysioToolkit from PhysioNet. I'm pretty sure the have some automatic ECG annotation tools. I looked, but couldn't find them. Still, I think they are there somewhere.

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