what is pressure levels for a diagnosis of pulmanary hypertension?

Answer 1

Pulmonary hypertension is characterized by elevated pressure in the artery connecting the heart and lung (pulmonary artery). The average normal pressure in this artery is about 12-18 mm Hg, while for a patient with pulmonary hypertension with the mean pressures at rest, exceed 25 mm Hg. and greater than 30 mm Hg. during exercise.

Click these links for more info if you wish:
http://www.americanheart.org/presenter.jhtml?identifier=4752
http://respiratory-lung.health-cares.net/pulmonary-hypertension-diagnosis.php
http://www.mediafact.com/pph/diagnosis.php