This book is a clinical guide to controversial and emerging topics in pulmonary hypertension. There are multiple challenges and unanswered questions encountered by clinicians that evaluate, diagnose and treat patients with suspected or confirmed pulmonary vascular disease. This book provides a deep dive into the diagnosis and therapeutics of pulmonary hypertension supported by the literature and balanced with personal clinical experience. Expert authors have chosen these specific topics to address issues where uncertainty and/or controversy exists as well as highlight areas that are just being incorporated into clinical practice. These topics include: exercise pulmonary hypertension, sickle cell disease and pulmonary hypertension, and sarcoid pulmonary hypertension, among many others. Chapters address the diagnostic and treatment dilemmas posed by these various clinical entities through literature review, sharing of expert opinion, and review of recent guidelines and their applicability to the multiple different nuanced presentations of pulmonary hypertension. This is an ideal guide for pulmonologists, cardiologists, and other specialty practitioners caring for patients with pulmonary hypertension.