Biotronik CLS algorithm causing problem
Hello, another newbie here!
Biotronik 8 DR-T implanted four weeks ago to treat total heart block. Just had first, four week, check up.
Prior to this, I had been exercising by walking down and up our village hill. Heart rate monitor recorded bpm. Noticed that on the second half of the uphill climb, my heart rate would suddenly jump to 120 bpm and stay there for the rest of the walk. It would not increase, even though I pushed myself harder. Seemed clunky, rather than smoothly progressive. I assumed that I had hit an in-built upper-rate limit.
At the checkup I asked to have this changed, but things turned out to be much more complicated than I had imagined. Brilliant staff at the hospital eventually had me walking up and down stairs whilst they recorded the effects of different settings. The data showed that, up to about 110bpm, the pacemaker was taking its cue from my own native sinus node signal and pacing the right ventricle accordingly. Beyond that, the Biotronik "response" algorithm took over believing it knew better than my own body when to beat my heart. This happened with both the CLS and, when tried separately, the other one - whatever it's called. The result was that these algorithms limited my heart rate to less than 120 bpm, leaving me slightly short of breath - just like I'd experienced on my village walks.
When these functions were disabled, and the pacemaker was responding only to my own sinus rhythm, everything went better and my heart rate increased smoothly up to about 130-140 bpm. I felt better too, breathing more easily at the end of the exercise.
Anyone else experienced this issue with the pacemaker suddenly deciding it knew best? Avid for more input around this issue!
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