Table 2 Etiologic groups of pulmonary hypertension [1].
From: Right-to-left shunt with hypoxemia in pulmonary hypertension
Etiologic group | |
|---|---|
Pulmonary arterial hypertension (group 1) | 7 (21%) |
Idiopathic | 6 (18%) |
Portal hypertension | 1 (3%) |
Associated with lung disease and/or hypoxemia (group 3) | 16 (47%) |
Chronic obstructive pulmonary disease | 8 (23%) |
Interstitial lung disease | 3 (9%) |
Combined pulmonary fibrosis and emphysema | 3 (9%) |
Other | 2 (6%) |
Thromboembolic obstruction (group 4) | 9 (26%) |
Miscellaneous (group 5) | 2 (6%) |