Variation in Heart Rate

Absolutely normal. It varies according to real load and to perceived load, the latter being the influence of hormones, including stress hormones, the 'tone' of the Vagus nerve (you can google that) and also what is known as HRV, or heart rate variability. HRV has become 'a thing' in recent years because its value signifies overall heart health. A heart rate that is invariant, maintaining within a millisecond or two of the same rate from minute-to-minute and hour-to-hour is not a good sign. Instead, HRV should, as its name suggests, be 'variable'. This means your heart rate should rise and fall.

Thanks. Very helpful info!

You do not say how much it varies. Is it a few beats per minute or 20 BPM? Are you just sitting and relaxing the whole time you take your BP/HR and nothing else changes yet you see your HR move from say 70 to 90 while you are just sitting doing nothing? Or are there other factors including if you have been physically working hard before hand, time of day or night, have you just eaten or woken from a poor nights rest?

Good points in this. Thanks. It seems to move around much more following some exercises or activities. That seems to slow down after I’ve been sitting awhile. The variance after that is only 2 or 3 BPM.
(I’m on carvedilol so my heart rate is usually pretty low- low to mid 60’s)

Here is a good link to read about HRV. HRV is not about how many BPM you have but about how long between beats and is measured in milliseconds. A BP monitor does cannot compute HRV vs BPM so do not confuse the two.
https://my.clevelandclinic.org/health/symptoms/21773-heart-rate-variability-hrv#:~:text=Heart%20rate%20variability%20is%20where,issues%20like%20anxiety%20and%20depression.

Thanks for sharing this. I appreciate it!