Pulmonary arterial hypertension (PAH) is a relatively rare but potentially life-threatening disease. In most forms, the disease is likely to be diagnosed late and is associated with progressive clinical deterioration and premature death. Enhancing the overall awareness of the wider clinical community, this volume outlines the need for more effective screening, diagnosis, and treatment. Topics discussed include disease background and epidemiology, the basics of the disease pathophysiology, clinical profile and diagnosis, pharmacological and surgical treatment strategies, and screening and management of PAH.