I am a 15 yr. old female with a very similar problem. I am in the process of trying to get some answers but getting the run around because it doesn't happen unless I'm excercising. Curious as to what kind of answers you get.
I have something similar. I'm 28 years old and was initially able to run up to 7 miles a day, in very hot and cold weather. All of sudden two years ago I was on a routine run and my heart rate would not come down normal levels. The card. did a full work up,(multiple ECG, Holter, event monitor, stress test, Echocardiogram, and a CT scan) and found nothing! I'm interested to know what your cardiologist says, as mine appear to be clueless as to what's going on with me. Also, I'm 5'8 168, with a normal blood pressure so I'm in dark as well. Good luck man.
Cardiologist doesn't think it's inappropriate sinus tach. I am being referred to another cardiologist that specializes in heart rate, but it might take a while to see him. Any other thoughts?
I would suggest that you speak more to your cardiologist. You may have inappropriate sinus tachycardia. Taking a beta blocker may help.
I forgot to add that it also takes my heart a much much longer time period to recover. in fact if I were to jog for 3 min and get my heart rate up to 190 it would take almost 30 min for it to come back down below 100.... Oh and I've also had a full body scan and there are no blockages.