The book consists of overviews and descriptive reviews of several aspects of the clinical presentation, treatment, and pathophysiology of Pulmonary Hypertension (PH), especially pulmonary hypertension associated with thromboembolic disease. Several veteran researchers and expert scientists from across the globe have contributed significant information in this all-inclusive book. The aim of this book is to serve as a good source of reference for researchers, scientists, students, doctors, etc. who are interested in studying about the various aspects of the disease of pulmonary hypertension.