Chronic chest pain with irregularly fast heart rate resulting in black outs

[DanniJan09]

January of this year I started to experience some chronic chest pain.  During a track conditioning practice outside, I passed out in a snow bank.  Ever since this incident I have been periodically passing out in school when I'm sitting in class or when I am excercising for track or drumline.  My doctors seem to think there is nothing wrong with this fast rate.  If I take too hot of a shower I get out and my rate is 170.  If it is too cold during class, my rate jumps up to 190 rapidly and I pass out.  We have done numerous stress tests and we recently did a tilt-table test (which I have not acquired the results from yet).  Any suggestions for certain tests, therapys, or different specialties to look into?
I would appreciate the feedback greatly.  This is very frustrating mentally as well as physically.

[grendslori]

You may want to consider having an EP Study done. That is a test preformed to evaluate the elctrical system of the heart and how it works. It is important to know if the high heart rates start and stop on a dime. If you say it happens rapidly, it doesn't sound like what I'm asking about. Usually the Tilt Test results are pretty quick. People have gone into shock and or passed out while having the test done. You haven't mentioned anything like that so chances are you are okay there. Ask about the EP Study.

[DanniJan09]

My doctors said that an EP study would be ineffective, seeing as I didn't pass out during the tilt table test and the stress tests were normal, just slightly faster than normal.  It also takes a while for my rate to lower.  Much longer than most.  The doctors told me I had an electrolite/fluid imbalance but I pushed gatorade for a month, nothing changed.

[grendslori]

The Tilt test checks how well the heart deals with blood pressures; in other words, it checks orthostats. The stress test may be normal, that doesn't mean you don't have some type of electrical problem going on. Chances are arrhythmia aren't the problem because arrhythmias always start and stop on a dime the reason for that is because the electrical impulse 'jumps' over to an abnormal electrical pathway. Your rates slowing down at a longer than normal time period tells me that you don't have arrhythmia problems. One thing that you have to realize is that you need to do more than just drink gadorade. You need to eat plenty of protein because it is protein that helps to keep the body hydrated.  

[DanniJan09]

The cardiologist seemed to think it was just an electrolite problem and not much else.  I know I don't know much about this, I'm pretty scatter-brained about everything to say the least.  I've been keeping extremely hydrated as well as eating plenty of protein even before this all started.  I eat a lot, but it's all healthy food with no preservatives in them.  It just doesn't seem to do anything.

[grendslori]

Have you had your urinalysis checked to make sure you're not losing protein in your urine? How about your blood chemistries done? Anything abnormal there?

[DanniJan09]

I'm not really sure what blood tests they've done.  The doctors don't really tell me much when it comes to tests, all I know is that they said they've done every blood test that would pertain to anything I could have.

[grendslori]

If you are still having a problem, DanniJan, consider the idea of seeing an Internist as opposed to the cardiologist. They usually have the ability to cover all of the body's systems and know how one system affects the other.

[DanniJan09]

Thank you for your time and advice. I appreciate it greatly and will take it into consideration.