Fluctuating pulse

[Ropo]

Question on pulse rate reported by O2 ring. I'm using a ResMed AirCurve 10 ASV machine. Been on it over a year. Getting really great numbers but still feeling sleepy during the day and wondering why. I see that during the every night, especially for the first couple hours, my pulse rate changes a lot (as shown in the OSCAR report). Is this a normal thing or do I need to have a beer and get hold of a sleep tech?
Thanks!

[Architect]

I have no idea, only can share my heart rate stays at a study pace between 62-65 during sleep. If you have any concerns, best to contact primary, cardiology or sleep clinic, sorry couldn't be more help.

[Miss Emerita]

Ropo, in your place I’d show the readout to my primary care physician and ask what he or she thinks. A sleep tech isn’t going to have expertise in questions about heart function.

[ChicagoGranny]

Interesting question. If you ask your doctor, please report the answer in this thread.

do I need to have a beer

Appropriate in all cases.

[dataq1]

I've no direct answer to your question, but consult with your PCP seems like a reasonable action.

I do however have a question with regard to the Oscar report:
1) Do you know what the resolution or sampling rate of your O2 ring is? (for example, is each data point on the OSCAR plot (for your Ring measured heart rate) an average of the prior 10 seconds, or 20 or 60 seconds, etc)

( the reason I'm asking that question is because one of my family has AFIB and it shows up very clearly on a Fitbit watch as rapid fluctuations in heart rate (that is reported in 5 minute averages). I've been thinking of suggesting that they use a O2 ring to capture heart rate fluctuations that might have a more frequent average reporting cycle)

[Ropo]

I've no direct answer to your question, but consult with your PCP seems like a reasonable action.

I do however have a question with regard to the Oscar report:
1) Do you know what the resolution or sampling rate of your O2 ring is? (for example, is each data point on the OSCAR plot (for your Ring measured heart rate) an average of the prior 10 seconds, or 20 or 60 seconds, etc)

( the reason I'm asking that question is because one of my family has AFIB and it shows up very clearly on a Fitbit watch as rapid fluctuations in heart rate (that is reported in 5 minute averages). I've been thinking of suggesting that they use a O2 ring to capture heart rate fluctuations that might have a more frequent average reporting cycle)

The O2 ring measures each beat of the heart. If you zoom in enough it shows pulse rate with each beat. The info from the ring was imported into OSCAR

[Ropo]

I've no direct answer to your question, but consult with your PCP seems like a reasonable action.

I do however have a question with regard to the Oscar report:
1) Do you know what the resolution or sampling rate of your O2 ring is? (for example, is each data point on the OSCAR plot (for your Ring measured heart rate) an average of the prior 10 seconds, or 20 or 60 seconds, etc)

( the reason I'm asking that question is because one of my family has AFIB and it shows up very clearly on a Fitbit watch as rapid fluctuations in heart rate (that is reported in 5 minute averages). I've been thinking of suggesting that they use a O2 ring to capture heart rate fluctuations that might have a more frequent average reporting cycle)

I added a zoomed in screenshot of the O2 ring info. Data from about a minute or two

[RadarRalfs]

Hello,

I use the O2Ring and normally OSCAR shows a Pulse Change Index of between 7 to 10. I don't know what is normal or bad or good for this metric so can't comment on your value of 84. It did remind me though of one night where mine was 207 but that was during an episode of Atrial Fibrillation. I have attached two screenshots. Hopefully you don't have AFib.

Regards,
Dave Hutchinson

[GrumpyHere]

The O2 ring measures each beat of the heart.

If you’re talking about the Wellue O2Ring, the sampling rate is actually once every 4 seconds according to the specs.

https://www.viatomtech.com/pulse-oximeter

[ChicagoGranny]

The display rate for HR and O2 is every four seconds.

The capture rate for O2 is every second, and for HR it is every beat.

[dataq1]

The O2 ring measures each beat of the heart.

If you’re talking about the Wellue O2Ring, the sampling rate is actually once every 4 seconds according to the specs.

https://www.viatomtech.com/pulse-oximeter

@grumpy.
I really wish there was more clarity here about the rates.
The specs seem to say that the sampling rate is 150 Hz (implies a sample taken every 6 milliseconds) ....and the recording rate is 4 seconds.

That suggests that for each recorded data point, there are 600 observations that are ??averaged??, ??median?? , ??moving average?? or otherwise somehow collapsed into a single recorded data point.

I'm not trying to say I have the answer, I just don't know how each 4 second data point is determined.

[Tec5]

The display rate for HR and O2 is every four seconds.

The capture rate for O2 is every second, and for HR it is every beat.

What do you mean “capture rate” ,specifically with regards to pulse rate?

[ChicagoGranny]

What do you mean “capture rate” ,specifically with regards to pulse rate?

Each beat is recorded in the data file. The display only changes every four seconds.

[Tec5]

What do you mean “capture rate” ,specifically with regards to pulse rate?

Each beat is recorded in the data file. The display only changes every four seconds.

RadarRalf provided a snip of the data file from his O2 ring. viewtopic/t181279/Pulse-Change-Index.html#p1413001, seems to show that data is recorded (written ) to the data file every four seconds:

CSV export:
Time, SpO2(%), Pulse Rate(bpm), Motion, SpO2 Reminder, PR Reminder
11:08:03PM Jun 3, 2022 96 56 0 0 0
11:08:07PM Jun 3, 2022 96 59 0 0 0

[Janknitz]

My pulse rate varied from 81 to 49 during last night with the highest being around 3:40 a.m., and averaging 54 BPM. From what I've been reading, it's pretty average.

I'm guessing the spikes occurred during REM sleep, I may have been having some pretty active dreams. Or I may have woken to change my position in bed. Not sure which.