If the doctor clears you, you may want to try exercising, start of slow and slowly increase your workload. I know every case is different, but when I was 16 my heart rate was 120 resting and by increasing my fitness threshold I was able to lower it to the 70s and 80s by my 21st birthday.
thank you for your answer I am headed to clevland clinic on thursday for evaluation. but the valve disorders could be causing the high heart rate???? that makes sense to me but there are so many heart issues that I have been reading about I dont know...
The question you have to ask of your doctor is why is my heart rate high? It sounds from your description that you have some right heart dysfunction, with decreased forward flow and that this is causing your heart rate to increase. If you feel symptomatic from this problem, the answer is not to take atenolol but to fix the underlying problem in the tricuspid and pulmonary valves. You should see a congenital heart specialist who may be better versed in this subject than a general cardiologist.
However if the tachycardia is not a sinus tachycardia you may benefit from an ablation procedure. But you need to ask the doctor what sort of tachycardia is this?