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MEDICAL

Nomenclature and Classification
of Pulmonary Arterial Hypertension

1 Primary Arterial Hypertension
  1.1

Primary Pulmonary Hypertension
[02/16/2006 Editor's note: This is an older classification and is no longer used to identify people with no known cause for the PAH]

    (a) Sporadic
    (b) Familial
  1.2 Related to:
    (a) Collagen Vascular Disease
    (b) Congenital Systemic to Pulmonary Shunts
    (c) Portal Hypertension
    (d) HIV Infection
    (e) Drugs/Toxins
      (1) Anorexigens
      (2) Other
    (f) Persistent Pulmonary Arterial Hypertension of the Newborn
    (g) Other
               
2 Pulmonary Venous Hypertension
  2.1 Left-Sided Atrial or Ventricular Heart Disease
  2.2 Left-Sided Valvular Heart Disease
  2.3 Extrinsic Compression of Central Pulmonary Veins
    (a) Fibrosing Mediastinitis
    (b) Adenopathy/Tumors
  2.4 Pulmonary Veno-Occlusive Disease
  2.5 Other
       
3 Pulmonary Arterial Hypertension Associated with Disorders of the Respiratory System and/or Hypoxemia
  3.1 Chronic Obstructive Pulmonary Disease
  3.2 Interstitial Lung Disease
  3.3 Sleep Disordered Breathing
  3.4 Alveolar Hypoventilation Disorders
  3.5 Chronic Exposure to High Altitude
  3.6 Neonatal Lung Disease
  3.7 Alveolar-Capillary Dysplasia
  3.8 Other
       
4 Pulmonary Arterial Hypertension due to Chronic Thrombotic and/or Embolic Disease
  4.1 Thromboembolic Obstruction of Proximal Pulmonary Arteries
  4.2 Obstruction of Distal Pulmonary Arteries
    (a) Pulmonary embolism (Thrombus, Tumor, OVA and/or parasites, Foreign Material)
    (b) In-situ Thrombosis
    (c) Sickle Cell Disease
       
5 Pulmonary Arterial Hypertension due to Disorders Directly Affecting the Pulmonary Vasculature
  5.1 Inflammatory
    (a) Schistosomiasis
    (b) Sarcoidosis
    (c) Other
  5.2 Pulmonary Capillary Hemangiomatosis

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