Right ventricular dysfunction and functional limitation in idiopathic pulmonary fibrosis.

there are significant overlaps in clinical, physiological and pathological features of the two diseases, including the mechanisms of bronchial hyperresponsiveness and atopy that drive obstructive phenotypes [7]. Although asthma may progress to chronic irreversible airflow obstruction, changes in reversibility over time are not widely reported [8, 9]. It may be that we require a new taxonomy to better define the various disorders of airway obstruction.