So an hour ago, my BPM went from 60 to ~175 in a minute as I stood up, but I did not receive any notifications on my Apple Watch 4 SS or on my iPhone even though the notifications were turned on for "Over 120 BPM". Any idea if this actually works or is it a glitch that needs patching? My Heart Rate has been over 140 BPM for a little bit now (According to my Watch that's running 5.0.1). Also, I just checked the chart and it looks like I've been over 120 many times today. I wonder if the notification work at all. Anyone experienced something like this before? How reliable is the Apple Watch? Dear Apple, Please hurry up and release that ECG/EKG. Also fix up the heart rate notifications.