@kellycross I have the same issue too! And I had a loop recorder implant at the end of January as well to test for afib. So far there's no sign of it. It usually happens when I am on my walks, sometimes it went over 160 but never lasted long, only a few minutes. It happens though every morning when I get up and walk 10 steps to the bathroom and my heart rate can go up from 70s to 110. I don't feel dizzy and sometimes I don't even know it until I check my fitbit. My resting HR is not as low as yours. It's frustrating because if I am busy with housework, my heart goes on cardio mode. Two cardiologists told me it's "conditioning", the first actually told me to go to the gym and starting running on the treadmill. I had stress test, and treadmill test, echogram (?) heart monitor and all my EKG come back normal. I even check my EKG at home with Kardia everyday. After my TIA, I had the loop recorder. I have high blood pressure too, it's usually pretty good but always very high when I'm at the doctor's office. Blood pressure varies during the day, I learn not to worry about it too much, stress can make it worse.