Pulmonary
hypertension (PH) is a complex and severe medical condition characterized by
elevated blood pressure in the pulmonary arteries, leading to significant morbidity
and mortality if untreated. The condition involves multiple pathophysiological
mechanisms that can result in right heart failure due to increased resistance
in the pulmonary circulation. The World Symposium on Pulmonary Hypertension
(WSPH) has developed a comprehensive classification system to facilitate the
understanding, diagnosis, and treatment of PH.