Sudden rate drop
I had sudden onset complete heart block last February and had a pacemaker placed. I've been doing fine, for the most part. This morning I was spinning and my heart rate got up to 167 (I have an Apple Watch and a separate HR monitor) and suddenly my HR dropped to low 80s, I got off the bike and laid down, though I didn't feel bad. After a couple minutes my HR jumped back up to a little over 100, which would be consistent with it coming down 2-3 minutes after stopping. Anyone else ever have that happen? It was a little alarming.