The current description of pulmonary hypertension is a testament to the physicians and scientists who dedicated their lives to furthering understanding of the pulmonary circulation. This has spanned a millennium, from ancient Egyptian descriptions of human anatomy to the current molecular and hemodynamic phenotyping of pulmonary hypertension. The recent Sixth World Symposium on Pulmonary Hypertension is a direct result of these discoveries and reflects an evolution in a classification scheme that has spanned half a century. This provides a framework for future directions related to therapeutics and mechanisms of disease.
Keywords: Classification; Diagnosis; Nomenclature; Pulmonary hypertension.
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