ECG help

[ccotto2]

I am a first year medical student and I have been practicing with ECGs. For some reason i was pretty nervous about it and my heart rate was slightly higher than usual (90bpm - not really worried about that). However i did notice that the p wave on lead II was slightly wobbly. It still followed its normal shape but it was just a bit wobbly. Everything else seemed normal. I was just wondering if this is a problem. Could we have slightly misplaced the electrodes to give this wobbly reading? Was my nerves a factor in this? Should i get a proper ECG done by a professional? I am a healthy 19 year old with no medical conditions and am not overweight or anything. I know this probably isn't the place to be asking this question but i just wanted to get some opinions on it.

[ccotto2]

I have reposted the question with a photo, i didnt know how to add a photo so i had to repost the question.

Thanks

[Bromley]

Voltages are usually measured using ad converters.  Those usually require a reference voltage such as g ground.  You could have a grounding issue, I.e measurement hardware brokenso that the ad converter is not referenced to the right voltage,  or poor connection between probe and ecg. Or the reference voltage input could just be floating.  You could also have another voltage source connected to the probe,  or to the internal ground.

[Bromley]

Welp, if the noise or wobbles are on all parts of the signal,  it might just be measurement noise. Can you set up the machine to average the waveform?

[achillea]

Can you provide a link to a picture of your EKG? A 'wobbly' p wave is hard to imagine.