Hi is it true that the interrogation only checks the last 24 hours? I was speaking to Boston Scientific yesterday asking questions and that is what they told me! I’ve been waiting 3 months for this interrogation (I constantly worry if I really needed a pacemaker although my exercise rates are much higher than they ever were and my last 3 interrogations usage (post op day one post op day 3 (ER shortness of breath and post op 2 weeks were 65% 82% and 76% respectively- they just had to adjust settings) plus the report says since the last interrogation I’ve wanted to know about when my heart rate goes below my lower limit if they could tell if it was a non captured beat - but she said then I’d would be half the rate which doesn’t make sense since I never went that low and when my heart rate goes to 190 while exercising (if I really push it)which is obviously on my own since my upper limit is 150 but doesn’t make sense since I never went above 135 prepacemaker and my max for my age is 170 unless I exercise the day before which she actually suggested also she said I might have rate historesis which I totally don’t understand and then what’s the point of a lower limit and why doesn’t it go down more often? Truethfully it doesn’t go do to the level it used to. By the way I was thinking it was my watch not being acurate but I know it’s equal to a pulse ox since I’ve tested that at work and I read a peer review journal article that said pulse ox is just as acurate as ECG in use of determining hrt rt with pacemakers 



by AgentX86 - 2020-01-11 12:34:27

- No, it's not true.  Pacemakers record statistics and events (that they're programmed to record) between interrogations.  They may keep more information for 24 hours but they keep information for the whole interval between interrogatinos.  Note that they are limited in what they can record and will only record what they're programmed to record. There is limited space so they can't record your whole life.

- Sorry, I can't parse a ~200 word sentence. Can you break it down?

- It's no surprise that a watch and a pulse ox agree (thought watches slip and give really moronic numbers).  Both use the same sensor.  Both will lie if you have any arrhythmia, particularly PVCs.  Anyone who told you that a pulse-ox is as accurate as an EKG has no idea what they're talking about.


by dwelch - 2020-01-11 20:59:11

I am on my fifth device, 32 years with pacers.  My first one or two had none of this, couldnt even be set for 55BPM lower limit could only do even tens 50,60...Later devices in my time frame started having storage of events.  Just like your computer it is not possible to store everything all the time, the device has limited storage, but ideally it only needs to store for around a years worth of events.  With these take home boxes, it doesnt even need to store that much. If you were having an exceptional number of events it would likely fill up, and there would ideally be a event indicating it ran out of storage.  Other than that it will keep track of events for the duration between visits.

It may be implemented in a circular fashion where it keeps the last X number of events once you hit X (ideally a large number) then the old ones get erased and replaced with the new ones, so they have a record of X events.  It may be implemented such that during the interrogation they read and clear the events.  And the record is essentially in the doctors office on paper or other.  The EP's version of the report will have the record of events from the last interrogation to the present, the one they give you if you can get one, might not have any it might have a very small summary of useless things like your name, and whatever else is stored about you in the device and battery life which is so wrong it is not worth getting worked up about, ignore it.  

Based on your other posts once you find a doc you can have a doctor/patient relationship with then perhaps you can get better visibility into the reports or information.

But no it is not only 24 hours, although as mentioned above there may be some high detail information that is stored but only the last X number of hours/days is retained and in circular fashion the tail is replaced by the head as time passes.  the brands I know of medtronic, st jude, boston sci, log events from the last interrogation which is often a year.


Why do you think you are pushing 170/190BPM?  Understand that the watches with heart monitors and other heart monitors may no longer work on use, they work on non paced people perhaps, also likely have bold print disclaimers somewhere that we ignored or tossed.  use the watch or stopwatch for a full minute and count it out, no cheating, no 6 second, 10 second, 12 second, 15 second, etc shortcut. full 60 seconds.  And even that might not be accurate esp if you are pumped up and breathing hard from the workout, etc...

Depending on your device and settings and also depending on what the device does for you, dont assume whatever your heart rate was before during exercise is what it is after a pacer.  it may be that if you go above the upper limit that it is your body doing that and the pacer lets that happen (doesnt make sense to me but possible) or that when you hit your upper limit (just like your lower limit) the pacer takes over and keeps you at that rate and wont let you go above until your natural rythm slows down.  Like me you might not have to do a treadmill stress test again, pointless, they do the chemical stress test instead.

sorry for another long post.

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I wouldn't be alive if it wasn't for pacemakers. I've had mine for 35+ years. I was fainting all of the time and had flat-lined also. I feel very blessed to live in this time of technology.