In 1993, Prof. Werner Seeger's group at the Justus Liebig University in Giessen, Germany, came up with a groundbreaking idea on how to treat pulmonary hypertension. In a webinar for the non-profit self-help association pulmonale hypertonie (ph) e. V., the chairman of the board and spokesman for the DZL vividly describes how this became a globally recognized therapy, how the treatment of pulmonary hypertension has evolved to this day, and what approaches researchers are currently pursuing to better treat or even cure the disease.