I am an engineer working on a project using ECGs. I am trying a few techniques and I was wondering whether the P-wave is still visible in the ECG after filtering it. The issue is that I believe the annotation I added on the image seems to be too close to the QRS to be a P-wave and the amplitude seems small.
Can someone confirm please (it is supposed to be sinus rhythm)?
Also, do you have any advise on identifying P-waves manually?