I am told I have a regular, but irregular heartbeat and also a resting heartbeat of 48 bpm. My Doctor doesn't seem concerned about these things.
However, a friend of similar age and weight, who like me walks around 4.5 / 5.0 miles per day, has recently had a Pacemaker fitted because in a pre-op examination the Anaesthetist said his low resting heart rate, which was slightly higher than mine. needed to be higher so he was sure he could bring him out of anaesthesia after the operation. My doctor didn't comment when I told him this in relation to my low resting heartbeat.
I am somewhat confused.