part of part of has part has part characteristic of inheres in has modifier Pulmonary arterial hypertension HP:0006546 Pulmonary hypertension can be secondary to known cardiac, pulmonary, or hepatic disease. If no cause is identifiable, the term primary pulmonary hypertension is used. Pulmonary artery hypertension Increased blood pressure in blood vessels of lungs UMLS:C2973725 SNOMEDCT_US:697898008 SNOMEDCT_US:11399002 SNOMEDCT_US:70995007 UMLS:C3203102 HP:0002092 Primary pulmonary hypertension Pulmonary hypertension is defined mean pulmonary artery pressure of 25mmHg or more and pulmonary capillary wedge pressure of 15mmHg or less when measured by right heart catheterisation at rest and in a supine position. UMLS:C0020542 Pre-capillary pulmonary hypertension abnormal increased pressure chronic blood pulmonary artery