BorderGal

In April 2018 Apple called one morning to tell me my watch had detected a rapid heart beat during the night while I was sleeping. They asked me to wear a heart monitor, free, for two weeks for their research.  I agreed, and they later sent report to my doctor, who confirmed I have atrial fibrillation, A-fib.  I now have a pacemaker and take appropriate meds.  Feel lucky to have turned 91st recently.  Needless to say, I love my Apple watch.