Sounds interesting. I don't worry much about my O2 except when my asthma flares up. Then I use my peak flow meter to see how my lungs are working. I have a strong pulse so I can check rate any time: either wrist or carotid.
I'm being stupid here but what is "heart intensity?"
The device I have has a 7bar element stacked vertically (so to speak) and this stack of bars is triggered by each ventricle beat. In my case the the number of bars seldom exceeds 4 bars. Using the device to check my wife numbers more pulses went the full 7 bars... best I can recall at the moment. I simply check on her finger to see what a healthy heart would register. The "intensity" display was very regular and strong. No so in my case. On the other hand my O2 was as good or better and her resting HR was in the 80s, higher than mine, mine being held down with beta and calcium channel blockers.
My cardiologist has agreed with my request to change my Metoprolol to Atenolol which I learned in another thread has a longer half life (slower release for regular non-SR tablets) and had a lower penetration. I have read other "good things" about Atenolol. I'll see if I have more steady HR (it is very easy to check now and I will confirm while still on Metoprolol that my sleepy rest rate changes significantly between 2 AM and 6 AM, given my sleeping problems Im sure I'll be awake. As noted, last night I saw a HR much lower at 2 AM about 3 hours into the BB dose run down, to the HR at 6 AM 7 hours into the BB dose run down. Then too, if the change in BB lets me sleep more restfully I may not be waking up at these wee hours times.
I have one of those as-well! very cool to get a better understanding. Your resting pulse is excellent for having afib. So is you O2 sat. the variance you are seeing at night could also be due to your own natural circadian rhythm. I'm not medicated at all, and I find that my average HR varies throughout the night. IN the wee hours, respiration slows down greatly which to me would have the greatest affect on o2 sat.
anything > 90 is fine.
p.s., O2 sat is a lot more affected by respiration then HR, in my humble opinion. For instance, when I was on top of pikes peak my heart rate didn't change and I didn't feel short of breath, but I was dizzy at times and that's from low 02 sat.
I have in recent years chronic nasal congestion, but almost only when lying down, as in bed time. While I can breath through my mount, and dry mouth in the night says I'm doing that more than I'd like, it is better to breath through the nose.
The congestion sometimes causes me to feel like I am suffocating...mental? many be. This is another condition driving my interest in the O2 sat level.
I took my 25 mg BB about an hour ago, so I assume my BB level is near maximum and my resting HR (sitting in front of my computer and TV) is about 80. It will be interesting to see if it drops again into the upper 50s in the early hours, just after waking up form a couple of hours of sleep.
I'll be on Metoprolol for my BB for another 10 days or so. I plan to use up the pills I have before changing to the new brand I requested. My cardiologist is likely just humoring me by agreeing to my request to try a different BB. He had been reluctant in the past saying why change anything you are doing well.. and I say I'd like to do better. I have read not all BB are equal, they are somehow different, including the half life on concentration in the blood, and in how "selective" they are in not affecting the brain operations.
Thanks for the explanation on "intensity." So more bars is higher intensity which is a good thing. Palpitations which feel like a pounding heart seem like a bad thing. I wonder if they register on the meter.
Then lower bars mean the heart isn't beating as effectively as it should.