Oh how hard this is for you. But wonderful you were in such great shape going into this and can still use your bike—your heart must be strong. Can you argue with your doc? I think they think 80 is the cut off (I am 74) but shouldn’t they take account of the person’s fitness?
I don’t understand tachycardia. It was always my warning that I was in afib, then it stopped completely (lucky to have an Apple Watch to tell me now I am always in afib). When I had tachycardia all I could do was rest.
Thanks for reminding me my weak legs and fatigue are connected—a consequence of uneven pumping.
Best wishes.