section 1. Classification, epidemiology, pathology, pathogenesis and genetics -- section 2. Imaging and diagnosis of pulmonary hypertension -- section 3. Clinical variants of pulmonary hypertension -- section 4. Medical treatment of pulmonary arterial hypertension -- section 5. Atrioseptostomy and surgery for pulmonary hypertension -- section 6. Difficult pulmonary hypertension -- section 7. Endpoints and clinical trials.