Guest editor Terence K. Trow has assembled an expert team of authors on the topic of Pulmonary Arterial Hypertension. Articles include: Epidemiology of Pulmonary Arterial Hypertension, Pathology of Pulmonary Hypertension, Genetics of Pulmonary Arterial Hypertension, Diagnosis of Pulmonary Arterial Hypertension, Pulmonary Hypertension Owing to Left Heart Disease, Pulmonary Hypertension due to Lung Disease and/or Hypoxia, Pulmonary Arterial Hypertension Associated with Congenital Heart Disease, World Health Organization Group 5 Pulmonary Hypertension, and more!