High MyAir Score but O2 Desats Continue

[Rubicon]

Either post some 1 to 2 minute images of the bad area in question or upload that entire night to Dropbox or Drive for better review. The Night Summary (aka SkyLab View) is not helpful for the kind of analysis you're looking for.

It enlarges for me:



During the period in question your HR increases (to wake levels). Is all that SWJ?

And you've got hundreds of PCs. What's up with that?

[Rubicon]

And you've got hundreds of PCs. What's up with that?

...my PVCs are down to 3% of my heart beats...

OK so if my adds and subtracts don't fail me 28,000 beats/night, 1450 PCs is ~5%.

[latskogkatt]

During the period in question your HR increases (to wake levels). Is all that SWJ?

And you've got hundreds of PCs. What's up with that?

There are a couple acronyms you used here that aren't in the glossary or wiki, and since they're less than 4 characters I can't search them. If you don't mind, I'd like to know what SWJ and PCs refer to.

[Rubicon]

PC Pulse Change. A change in heart rate of 6 beats per minute but user-adjustable.

SWJ Sleep-Wake Junk. A term I invented denoting the interface between sleep and wake when breathing can be unstable. If someone is having difficulty taking sleep, waveforms during this period can be one big mess.

[ozij]

During the period in question your HR increases (to wake levels). Is all that SWJ?

And you've got hundreds of PCs. What's up with that?

There are a couple acronyms you used here that aren't in the glossary or wiki, and since they're less than 4 characters I can't search them. If you don't mind, I'd like to know what SWJ and PCs refer to.

So glad you asked!

PC Pulse Change. A change in heart rate of 6 beats per minute but user-adjustable.

SWJ Sleep-Wake Junk. A term I invented denoting the interface between sleep and wake when breathing can be unstable. If someone is having difficulty taking sleep, waveforms during this period can be one big mess.

And so glad you replied!

[zonker]

During the period in question your HR increases (to wake levels). Is all that SWJ?

And you've got hundreds of PCs. What's up with that?

There are a couple acronyms you used here that aren't in the glossary or wiki, and since they're less than 4 characters I can't search them. If you don't mind, I'd like to know what SWJ and PCs refer to.

So glad you asked!

PC Pulse Change. A change in heart rate of 6 beats per minute but user-adjustable.

SWJ Sleep-Wake Junk. A term I invented denoting the interface between sleep and wake when breathing can be unstable. If someone is having difficulty taking sleep, waveforms during this period can be one big mess.

And so glad you replied!

so glad you repeated it!

[ArthurDent1978]

Either post some 1 to 2 minute images of the bad area in question or upload that entire night to Dropbox or Drive for better review. The Night Summary (aka SkyLab View) is not helpful for the kind of analysis you're looking for.

During the period in question your HR increases (to wake levels). Is all that SWJ?

And you've got hundreds of PCs. What's up with that?

Yes, what's up with that indeed. I have been told by ECG technicians that I have respiratory sinus arrythmia. https://www.healthline.com/health/sinus-arrhythmia When I breath in my heart rate increases, when I exhale it decreases. This is what I have been told. I see heart rate spikes that seem to line up to low SPO2 events. Part of what I am trying to solve actually is why my heart rates seems to change so much versus others whom I have seen.

Aug_4th_bad.png (373.41 KiB) Viewed 2095 times

Here is a particularly bad moment. You can see it is OA, then breathing, OA then breathing, etc, etc. and oddly no leaks. It isn't calling it a clear airway event - calling it obstructive. O2 for sure dropping...

I am going to buy a better mask but since I see no leaks just feels like my air hole is plugging up and saying sorry, not sorry to my heart and brain. I am also going to try a cervical collar.

I'd appreciate any insight.

[Rubicon]

That screen looks more like HF HRV to me.

Those PCs could be LF HRV, HF HRV, SA, the PVCs or other. Really need an EKG channel to precisely explain the 1450 PCs.

See viewtopic/t57907/To-gvz.html for some explanation.

[ArthurDent1978]

That screen looks more like HF HRV to me.

Those PCs could be LF HRV, HF HRV, SA, the PVCs or other. Really need an EKG channel to precisely explain the 1450 PCs.

See viewtopic/t57907/To-gvz.html for some explanation.

I have a personal ECG, but I don't think I can add that channel to Oscar, can I? I have had numerous heart work ups. ECG, Stress Test, Echo, etc. My diagnosis is Benign PVCs. I can't speak to the Heart Rate changes except that I have also used ReadMyEcg (an app that you can submit your ECGs to be read by a tech) and they come back frequently with Respiratory Sinus Arrythmia.

Does LF = Low Frequency, HF = High Frequency, HRV = Heart Rate Variation, SA = Sinus Arrythmia?

[Rubicon]

ReadMyEcg (an app that you can submit your ECGs to be read by a tech) and they come back frequently with Respiratory Sinus Arrythmia.

The August 4th snippet you posted isn't SA, it's LF HRV.

The PCs that night don't start until 2.5 hours into the night. Seems to me SA would be consistent regardless of the circumstances.

IDK about the qualifications of the ReadMyECG Techs. They could be LSsOS.

What are the desat and PC parameters set for?

IIWM I'd magnify the Pulse Rate channel, go to 60 second view and try to match up the PCs with the corresponding respiratory event.

Determine the duration of the PC events. SA will be up to 2.5 seconds.

[Rubicon]

Specifically:

HF 0.15 - 0.40 hz or 6.7 seconds to 2.5 seconds
LF 0.04 - 0.15 hz or 25 seconds to 6.7 seconds

[Rubicon]

SA will be up to 2.5 seconds.

Or down to, depending on your POV.

[Rubicon]

This reminds me of the good ol' days:



You know what this says in 12 words or less?

In central apnea and CompSA the apneas are all the same length.

[ArthurDent1978]

You know what this says in 12 words or less?

In central apnea and CompSA the apneas are all the same length.

Help me understand better. What is CompSA? I'm confused - are you saying that a sinus arrythmia can cause apneas? Sorry I'm just not following your logic.

[Rubicon]

Did you look at my link above? You need to deep dive into those PCs to see the exact timing. If the entire change occurs within a single breath, slow during expiration, faster during inspiration, then it's a sinus arrhythmia. If it occurs during a respiratory event, slow during apnea, faster during resumption of breathing, it's LF HRV. If there's arrhythmia, then that's the cause.

In your screenshot it looks like LF HRV there. Put the pulse value parameters at like 50-80 and it should stand out a little more.

Then look for respiratory variation throughout the night to see if there's a pattern.