@kthrn1 Not really common, but most hearts will have HRs about 15 BPM higher than 'normal', with some higher, and this can go on for months. I have seen posts by people who report HRs in the high 80's and low 90's whose heart checked out, but they stayed at that high HR for many months until they began to fall. Even a full year!!

You don't want to succumb to fear and anxiety, so if you haven't already, ask to see your cardiologist or EP, or at least to talk to them, and let them know what's going on.