I have been reading a lot about slow heartbeats.  I know that I should not get ahead of myself but I am a "Googler" at heart.  The internet is full of lots and lots of information.  My primary doctor gave me a print out of the electrocardiogram that I had in her office. The term sinus bradycardia was on it.  I will have an echocardiogram on Monday.  I called Aetna today and they were helpful to me.  I asked about the cost of an echocardiogram, and they were able to provide me with the answer to that.  The Aetna representative even called the facility where I am having the test, and confirmed some facts for me.  I was impressed.  I have been reading about bradycardia, and it's relationship to hypothyroidism, which I have.  I won't draw any conclusions, but it does have me thinking.  I have been taking thyroid medicine for about 1/2 my married life, and about 1/3 of my 70 years.  Interesting reading for sure.  Lots of questions for my primary doctor, and cardiologist when I finally see them both after my test results come back.  So far I have not had any side effects from any of my new medicine, but it has only been a few days.   Anytime anyone gives me printed pages after an exam or a test, I am all over the internet googling.  I won't self diagnose myself, but I will educate myself if I can.