My English isn’t that good, but I will try to explain my problem. We just got the ECG function here in Europe. I have a Apple watch series 4 and a tattooed wrist. The heart rate sensor measuring my beats have been pretty accurate. But the majority of the ecg-readings are unreadable. I feel fine but the ecg-reading looks terrible. I do have a heart condition but have done surgery so my heart should be perfectly fine. I did a ”real” ecg reading at a hospital about a month ago and everything looked fine. The only thing that bugs my mind is that I asked a friend of mine to try my watch (she has a much darker tattoo at the same spot on the wrist) and her reading came out fine. So why is my watch acting up on me like this? Is anyone else having the same problems with the electrocardiogram?