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. Author manuscript; available in PMC: 2020 Jul 29.
Published in final edited form as: Rev Cardiovasc Med. 2020 Jun 30;21(2):163–179. doi: 10.31083/j.rcm.2020.02.597

Figure 1: Updated classification of pulmonary hypertension.

Figure 1:

This classification is based on recommendations from the 5th World Symposium on Pulmonary Hypertension in Nice, France, 2013. The World Health Organization classifies PAH into five broad groups of pulmonary hypertension based on the clinical similarities. The five groups of PH are: 1-PAH, 2-PH associated with left heart disease, 3- PH associated with chronic lung disease and/or hypoxia, 4- chronic thromboembolic PH (CTEPH) and 5- PH with unclear or multifactorial mechanisms.