Not long ago, I had the same question. I learned that PAH is one type of PH. Here is a good article about it. https://phassociation.org/patients/aboutph/type....

No. It is different. PHA also involved
Heart Conditions and Heart Failure.
Check with Doctors and Google Info

i have PAH also and trust me i'm not laughing

No, it's a different form of PH. I have advanced PAH and it's no joke