This sort of the post I needed to read. I had a mild tachy event a few weeks ago, but have been having what now seem to be some Afib symptoms (occasional dizziness), irregular heart rate, along with my Apple Watch telling me I had had two sets of 5 events of AFib symptoms. One of these sets came after an “easy” ride that I felt really short of breath and HR sat at 160+ for the best part of an hour for low, low speed.
Before all this, I’d had a consistent decrease in form and some feeling of heart beating out of my chest (which I though was normal), but looking back, it might not be so much.
ECG booked in, and thence to the cardiologist. Family history of tachycardia (father, brother, uncle all have had ablation of a dual AV nerve) and aFib (all the family have had electroversion).
It had to hit at some point, training seems to have held it off.