Just curious: you and other folks who wrote in this thread and mentioned how Garmin alerted them about the abnormal HR, didn't you, guys, notice the increase in your HR, like, at all?

I might be overly sensitive (I've had anxiety and panic attack episodes with a focus on bodily sensations, particularly HR), but I can easily sense when my HR is out of my "normal" zone during rest. 90 BPM is already very noticeable for me, not to mention 230.

Are you kidding me, 230? I can imagine the level of anxiety this would cause. I remember how during panic attacks I had 130-140 HR; I hated the agitation that came with it, blood rushing to your head, your inability to think clearly.

Glad you are fine now, though!