Probably not: If you are active, that is, fit, your resting heart rate would be less than 60 BPM and when sleeping even lower. So the context is imp. Further, if when doing stress test, your heart rate increased appropriately, then additional evidence that you don't have chronotropic incompetence. Last, I see u r on thyroid medicine, so be sure your TSH is in normal range .
Answered 6/6/2015
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