experience with Micra AV and exercise?
53 yo male. I developed bradycardia suddenly a little over a month ago. I was initially in a state of complete heart block, but after going off a medication (imipramine), I am now in first degree AV block, with a long PR interval (432 ms). My cardiologists don't know the cause but they believe it was not from a heart attack. I am awaiting a heart MRI to check for sarcoidosis in the heart, which is unlikely, but since the cause of the heart block is a mystery they want to check. (They have also eliminated medications, Lyme disease, and thyroid issues as possible causes.)
Given that a pacemaker seems inevitable, one cardiologist suggested the Medtronic Micra AV as the pacemaker he would recommend by default. A second cardiologist said that the Micra AV switches to an accelerometer mode above 115 bpm (programmable upper tracking rate 115 bpm) so it's not always ideal for those who regularly bring their bpm over that. I'm not a major athlete but I do play squash a couple times a week, and go on hikes and moderately strenuous walks.
My understanding is that most/all pacemakers use an accelerometer. I don't understand much about the interplay between the accelerometer and other inputs/mechanisms pacemakers use, but from what the second cardiologist said, it sounds like the Micra AV switches to a "pure" accelerometer mode above a certain bpm in a way that other pacemakers don't?
In any case, I'm trying to understand what it actually feels like with the Micra AV when you raise your heart beat up to the level of moderate or above-moderate exertion.
Does anybody have a Micra AV? Do you do sports with it? Does the 115 bpm limit or "switch-over" (as I'm imagining it) affect you? What does it feel like when your bpm goes to 140 or 150 or whatever as you're exercising? Were you able to adjust/tune the pacemaker settings to make it work for you?
Thanks for any information.