COPD
Asthma (chronic obstructive asthma)
Bronchiectasis
Cystic fibrosis
Chronic bronchitis with normal spirometry
Bronchiolitis
Intrathoracic airway obstruction (e.g. from bronchogenic or metastatic cancer, lymphadenopathy, or scarring from an endotracheal tube)
Heart failure
Tuberculosis
Recurrent pulmonary emboli
Obliterative bronchiolitis
Diffuse panbronchiolitis
