Sudden change in HR from long time patterns right after most recent routine 90-day pacemaker check
Short story: Exercise HR in long-done exercises at about 5-6 met level have suddenly dropped about 30 beats. Rise and fall of HR on resistance circuit long-ranged 100-120, but is now 60-80 with recovery to 60 long before catching breath. Sleeping heart rate suddenly shows no increase in HR for movements from 60 setting for sleep bradycardia.
More detailed story: In my opinion, one or more of three items (my heart, PM, or PM setting) has suddenly changed after 3 years. The PM checks have been routine with little info given to me or asked for by me. The Electrophysiologist MD who reads the device said there was no change in setting at my last visit. Yet at my next cardio gymn exercise session, the very next day (July 10), my exercise tolerance plummeted with shortness of breath.
Walk in HR, usually 80-100, is now a flat 60
Warm up on NuStep arm-leg machine, was 70-80 before, is 60 now
NuStep for 13 minutes: was rising to 110 in the first minute and remaining there for the duration, now its 60 for the first 2-3 minutes then rising to 80 for several minutes, possibly hitting 90 briefly--all this at 5.0 met level. I recently dropped exertion level to about 4.5 mets.
On another machine, the SciFit, I was at 5.8 level with sustained HR of basically 115-125 (close to the gym's standard for me 114-124). Now I am too breathless and taxed to continue at 5.8. Did 5.0 level today and HR didn't rise above 60 for first 6.5 minutes when it hovered near 75 and then dropped down to 60 for the last two minutes (of 13 minutes total on the machine).
On the resistance circuit, the patterns were and still are reasonably consistent within sessions but vastly different between sessions after the change noted at July 10. On the Keiser pull down my easy round is 15 reps at 85 lb in about 45 seconds. HR used to get into the 110-120 range and I'd wait for recovery to 100 for a minute or two, catching breath, as for all machines. Today, HR got to 84 and then dropped back to 60 in 30 seconds on the pull down. Other machines, much the same.
As a "wired" sleep apnea person: Graphs of data from an accelerometer, synchronized with CPAP machine breathng data have long shown that at roll overs or significant changes of position would raise HR from the 60 minimum held by the PM to 70-80. Now the HR is a flat 59-61 all night, 90% 60.
At an August visit to the Vascular Cardiologist he consulted with the Elecrophysiologist and he/they want me to have an angiography before doing anything to reset or change PM.
That does not make sense to me, but the gym's cardio RN says suddenly (and coincidentally) blocked plumbing may account for this sudden, overnight, change in HR, the electrical triggering.
As a newby, I hope someone who understands this can shed some light on it for me.
Thanks for reading,