Pulmonary arterial hypertension
Primary pulmonary hypertension
	Sporadic disorder
	Familial disorder
Related conditions
	Collagen vascular disease
	Congenital systemic-to-pulmonary shunt
	Portal hypertension
	Human immunodeficiency virus infection
	Drugs and toxins
		Anorectic agents (appetite suppressants)
		Others
	Persistent pulmonary hypertension of the newborn
	Others
Pulmonary venous hypertension
Left-sided atrial or ventricular heart disease
Left-sided valvular heart disease
Extrinsic compression of central pulmonary veins
	Fibrosing mediastinitis
	Adenopathy and/or tumors
Pulmonary veno-occlusive disease
Others
Pulmonary hypertension associated with disorders of the respiratory system and/or hypoxemia
Chronic obstructive pulmonary disease
Interstitial lung disease
Sleep-disordered breathing
Alveolar hypoventilation disorders
Chronic exposure to high altitudes
Neonatal lung disease
Alveolar-capillary dysplasia
Others
Pulmonary hypertension resulting from chronic thrombotic and/or embolic disease
Thromboembolic obstruction of proximal pulmonary arteries
Obstruction of distal pulmonary arteries
	Pulmonary embolism (thrombus, tumor, ova and/or parasites, foreign material)
In-situ thrombosis
Sickle cell disease
Pulmonary hypertension resulting from disorders directly affecting the pulmonary vasculature
Inflammatory conditions
	Schistosomiasis
	Sarcoidosis
	Others
Pulmonary capillary hemangiomatosis