Pulmonary Hypertension involves specific alterations in pulmonary hypertension physiology. The pathophysiology of Pulmonary Hypertension encompasses changes in myocardial contractility, cardiac conduction, vascular resistance, endothelial function, or structural integrity depending on the primary mechanism involved. Key cellular processes include ion channel dysfunction, inflammatory mediator activation, oxidative stress, fibrotic remodeling, and neurohormonal dysregulation that drive the clinical manifestations of pulmonary hypertension.