Hi all, I recently bought an Alivecor monitor which I use with my Nexus, and a oximeter, because I was curious to know whether my breathlessness was caused by my heart or my asthma. I found the oximeter was sometimes struggling to get a reading when the little heart beat bars were going a bit mad and the Alivecor sometimes shows beats of 150 or more even though my pulse feels fairly steady. I've checked both gadgets on other people so I know they are working.
I'm very puzzled by this so I wondered if anyone has any explanation? I know my heart is weak so wondered if the extra beats are just not strong enough to show in my pulse?