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Annoyingly all the ECGs I have done, even with hard, max heart rate efforts have come back completely clear.
I had atrial fibrillation and a couple of 24h ECGs came back normal, it's only because one time my GP heard something momentarily off that they believed me at all. On a 72h one it finally showed up and they took interest. I had a similar diagnosis of "it isn't affecting your quality of life, so just keep an eye on it" - until a couple years later my dad's similar condition worsened such that he could no longer have an ablation and had to have a pacemaker fitted - at that point they decided I should have an ablation. (None of this is covid-related though - this was several years ago)
hoefla
Went for a club ride on Sunday, fairly lumpy, brisk paced, but managed to not get dropped.
All fine for 3h or so, but on my way home with a friend, I stopped at some traffic lights, took a swig of cold water and my heart rate jumped to 210bpm.
This isn't completely out the blue, as I have had SVTs infrequently before, usually when I'm fighting a virus, or under the weather. Usually lasts for 1-4 minutes, quick rest, a couple of coughs, and it goes back to normal.
This time though my HR averaged 196bpm with a max of 235 for 34 minutes. Including 2 periods off the bike on the side of the road to rest and see it go down. Soft pedalled home escorted by friend just in case, no more than 100w for the whole episode, Only went down to normal once I got home and sat down.
Longest duration its ever been, called NHS 111 for advice.
With some talk of post covid and heart damage/myocarditis, it has got me rather worried.
Previously, cardiologist has said that if the episodes are repeatable, manageable, and causes no symptoms (light headedness, fainting, dizziness, pain) then I could get away with not having a cardiac ablation or similar, but definitely has me thinking again of being referred back.
Annoyingly all the ECGs I have done, even with hard, max heart rate efforts have come back completely clear.
I think I need to try and push for a heart MRI.