Dropping some of that weight would put an end to some of your problems. No salt, no flour, no sugar, no sodas, no fatty foods....that should give you a good start and get moving. You sound pretty young, but I don't recall. You can do this! It's THAT important! Do you have diabetes yet, if not...you will have! Get Proactive and take care of that body of yours!
Sorry I forgot to give some other information..
Thyroid function is normal, all blood chemistry and counts are within normal ranges. I'm 32, 6'2" and weigh about 300 pounds, not incredibly active. Family history of diabetes but no heart disease.
Check your heart rate when you are truly at rest, at home during a quiet period when you are not thinking about stressful subject. If you can't find such a period, that may be the cause. Many people have a high HR when at work, work can be stressful even if we have accepted the situation and don't consider we are stressed.
We're patients here, but all (I ask) try to help, not criticize, based on our collective experiences with the symptoms given. It may be helpful to ask some questions, I hope my question/statement is of value.
Here is a link to an article on inappropriate sinus tachycardia:
http://www.heartracing.com/physicians/inappropriate.sinus.tachycardia.asp
After you read it, it would be a good idea to get back to your doctor with a list of written questions in your hand.
Of course none of us here is a physician, but many of us are veteran cardiac patients well experienced in the kinds of questions that patients need to learn to ask of their doctors.
There's nothing there to talk about...
You question, "Did they measure thyroids? Dehydration? Stress? Anxiety"
Add to that, what is your height, weight, physical fitness, AGE, family history, blood chemistry, on and on and on.
There's nothing in the OP to give anybody any traction to any useful answer to the question at hand.
I assume that is a known fact. But it is greatly valuable to be able to discuss the symptoms, and maybe one of us will come up with something he can discuss with a physician?
Sorry, I just think you were a bit negative :)
Sounds like your doctors should look towards non-cardiac causes for your rapid heart rhythm?
Did they measure thyroids? Dehydration? Stress? Anxiety?
If you ask for a 24 hour EKG test, the doctor will see if your heart rate drops during the night. If it does, maybe you are just constantly stressed? A heart rate of 130 while taking 160 mg of propranolol is fairly high, but with normal echo, normal blood pressure (not low), and normal sinus rhythm/tachycardia, cardiac causes for your rapid heart rate is more or less ruled out, and maybe you should visit a GP or internist for further testing?
Sorry you're experiencing this. Because your ECG looked normal doesn't mean you don't have a problem. Did you get a copy of it? And anything else pertinent? Sometimes new meds can cause these symptoms. You need to keep checking your HR and BP. Being on the correct med combination should help....unfortunately, sometimes it is trial and error. Keep in touch with your Dr. on this and keep us updated on how things go. Good Luck!
Keep in mind: NOBODY here is an MD. Zero medical school classes in cardiology have been passed by posters to this fourm. Furthermore, your question is unanswerable even if we were the smartest group of EP's on the planet.
You've set out a 5000 piece puzzle. Put togehter the edge peices, hidden the box and asked us, "What is this a picture of?"
Only a detailed conversation with your doctor can answer this. If your Doc doesn't make you comfortable... get another.