SharonMullings:

You were asking the side effects of Cardiac Catheterization. The only thing I can think of is possible soreness or discomfort at the site where the catheter is inserted for the procedure.
There are 3 sites that seem to be most commonly used, and they are the groin, the wrist and the neck. I have had several and they have always been in the neck. Very little discomfort and no recovery time. I did not need any type of sedation. Some people do. So it would be a decision between you and your Cardiologist. I was home a few hours later.
Treatments are dependent on what group your PH happens to fall under.....the underlying cause of your PH. As an example, if it was caused by Sleep Apnea, then at least part of your treatment would likely be a C-Pap machine. Depending on your oxygen levels or saturation you may be prescribed Supplemental oxygen.
There are so many different aspects to this disease that there is no one size fits all. We are all unique. I have PAH which is caused by an underlyi
ng autoimmune disease....Scleroderma. so my treatment is different than someone with Sleep Apnea or caused by heart disease. So, it is very complex. I have a chart that I will post if I can find it!
Hope this answers some of your questions.

As a Writer(Hope- P.T S. D. / Suicide Prevention);Now trusting on the Grace of God.