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Diagnosis & Treatment

About Pulmonary Hypertension

The term pulmonary hypertension refers to high blood pressure in the lungs. While in systemic hypertension, the arteries throughout the body are constricted; PH affects only the blood vessels in the lungs and the right side of the heart. Despite a universal elevation in pulmonary artery pressure that broadly defines the condition, there are many etiologies that lead to very different phenotypes with diagnostic and therapeutic management implications.

This About Pulmonary Hypertension section provides an overview of the epidemiology, pathophysiology, diagnosis and treatment of four of the five types of pulmonary hypertension as currently defined by the World Health Organization. Click on any of the links below to gain an understanding of PH, review the different WHO Groups, or share this information with a medical provider colleague:

Classifications of Pulmonary Hypertension

The World Health Organization (WHO) first defined the classifications of pulmonary hypertension in 1973 and the classifications have been revised over the years. The classifications of PH were most recently updated at the 5th World Symposium on Pulmonary Hypertension in Nice, France, in 2013.

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