I now have three devices that measure BP and pulse but they fail with error when below 40bpm. I am known to cardiology and regular checks and may get CRT soon (complex as my EF is 40% so borderline and could make it worse) but need to record readings. I often get bpm of below 30 measured manually and with oximeter but they are useless too, as do not pick up ectopics. I tend to get 24 strong beats in a minute when resting and very faint beats all over the place so devices do struggle but even with ectopics its under 40. I am told to check it daily but I do not see the point as whatever the reading nothing is done. Recently had ecg at A&E and they recorded low thirties.
I am also interested to see if any devices do... I ask question on Amazon but just get silly responses that you should get medical help - that I do have already. I do think the NHS should provide or at least at cost price .
I suppose nothing beats the manual wrist check but it does not record it .