I use an ECG device to keep an eye on my heart. I am under treatment for high blood pressure and mitral valve prolapse and have incomplete LBBB. I notice that sometimes when I take my recording, I have these very low amplitude waves, which suddenly snap back into nice crisp waveforms. Usually, if I walk around and take my recording shortly after sitting down, I get these low-amplitude waveforms, sometimes constantly; other days, they are always crisp. Am I overreacting to what I am looking at? Is it normal to look at how it does and then suddenly pop back up?