This course, held in June 2017, was the fourth course to be organised by the ERS to teach the basics of pulmonary vascular disease and pulmonary hypertension to participants with good knowledge of respiratory medicine, but only a background understanding of pulmonary vascular disease. The first course was held in Edinburgh, UK, in 2007, but since then it has been held in Lausanne at CHUV hospital on a biannual basis in June. Holding the course in a hospital allows access to patients and to equipment such as echocardiography, which ensures that workshops can be conducted live on real patients.