I was told unless a right heart cath is done, they do not consider HP. What has been the correlation between the results of echo vs heart cath? Is output the same, more / less than the echo? RLN was damaged during removal of thryoid, hyper and hypo nodules, 2 para thyroid. Now diagnosis with Asthma. It was stated RNL does not become involved w/HP.... BUT RNL feeds into vague nerve which determines the amount of gases going into and out of the lungs. It seems this could be making the lungs worse ? Could this build more pressure for HP?