Hi @Farhan
Acquiring the electrical activity of the heart sounds cool!
I think this will all start with the acquisition of the electrical signal of the heart. so here are some of the points which may help you to get started.
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As already a lot of work has been done in ECG, so what kind of probes or lead system do you want to use to acquire the ECG signal.
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What are the signal voltage ranges (weakest and strongest) of ECG signals acquired from the body?
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What are the frequency components of the ECG signal?
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Morphology of ECG Waveform.
Let’s start with knowing the ECG signal and this will help you to move towards the development technical requirements of Signal Acquisition, Signal Conditioning, Digitization, Filtering, and storing the data.
Happy Making!