Heart Failure Support Group
Heart failure is a condition that can result from any structural or functional cardiac disorder that impairs the ability of the heart to fill with or pump a sufficient amount of blood throughout the body. It is often undiagnosed due to a lack of a universally agreed definition and difficulties in diagnosis, particularly when the condition is considered "mild."

I just done some reading up about pulminary hypertension - specifically for you.
Here is a good link:
http://www.mayoclinic.com/health/pulmonary-hypertension/DS00430/DSECTION=lifestyle-and-home-remedies
I believe that if I were presented by my cardiologist with your request - I would go to the clinic. I expect that their special expertise would benefit you in the long range.
And it is quite probable that they could recommend less intrusive meds to help you than the run of the mill pulminary doctor.
Hugs, Raoul
Its quite ironic but I was on the computer, and I read your post, as I am reading it. There was a medical show on the tv that is talking about a little girl who went undiagnosed for a long time with heart pain and fainting etc. It turns out she has Pulimonary Hypertension. When they were talking about this the talked about the importance with this of seeing specialists. The Mayo clinic is the best of the best. I know medical bills can be costly, but in the end, don't you deserve to know you went to one of the best places you could? Its just my thought. I hope whatever you choose its the best for you!
Take care, and good luck!
Maryam
So it isn't cheap.
But if you don't have the right insurance and you can't afford it then there are other good doctors out there, something my GP told me that MayO Clinc is just another group of medical doctors.
I don't know all the MayO clincs are good? just food for thought...