I had one of these monitors for a couple weeks after some vertigo issues:
(not my chest!)
There was a button to push if I had any events - I pushed it a couple times even though it wasn't bad just so they'd have something to look at. The whole thing got downloaded when it was over; it wasn't a wifi device or something.
My heart shows a little bit of the stuff that everybody gets - little calcium, little myopathy, little arrhythmia, docs aren't worried. I'll probably die of something else.