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.