HR variation during exercise
Dear wise friends,
Apologies for this detailed message. I am an otherwise healthy 52-year-old female with a PM installed three years ago (12/17) for bradycardia and heart block. A month ago I developed AFib and had a successful cardioversion earlier this week. There is some thought that I may have hypertrophic cardiomyopathy (MRI in 2017 showed asymmetric septal hypertrophy and mild enlargement of both ventricles and left atrium) and I have an appointment with a specialist in this disorder in a few weeks.
My main (only) complaint has been chronotropic incompetence with exercise, which continued to plague me even after the PM installation. After the cardioversion this week, my EP tweaked my settings this week, keeping my resting HR at 50bpm and raising my maximum bpm from 150 to ... something higher (he did not specify a number).
I have cautiously begun to exercise again — walking, mainly, and short, light jogs — and though I feel mostly fine, my HR monitor is showing HR accelerations that don't correlate with exercise intensity. So that while my HR might accelerate normally during a job over .3 miles, say, when I then pause and begin to walk, my HR might continue to accelerate, hitting 170 bpm after a couple of minutes and then dropping into the 80s a minute or so later and then rising a couple minutes later to 140 bpm, etc. The resulting HR graph on my app shows a series of spikes and troughs.
Should I avoid exercise until I can see a specialist? Or is a HR monitor not 100% reliable for people with PMs? I'm trying not to be alarmed, but the pattern I'm seeing disturbs me.
Thanks for any advice,