Re: heart rate 100 to 105... is that bad?
Yes, that certainly sounds a little on the high side. Have you done some basic blood tests to see what could be causing this? Laura is correct in saying that the older you are, generally, the slower your heart beats, but at your age, this is a tad high in my opinion. Do you have any other physical symptoms of this? For example, shortness of breath, dizziness, "faintish spells", etc? Has your doctor ruled out an overactive thyroid?