<qa>  What is the purpose of the New International CTEPH Database?The New International CTEPH Database is a prospective, observational multi-center disease registry run by the International CTEPH Association ICA, which will collect data in chronic thromboembolic pulmonary hypertension CTEPH patients worldwide. The registry will run for approximately 5 years. Its objective is to provide an overview on epidemiology of CTEPH, mode of diagnosis and treatment approaches worldwide as well as determinants of long-term outcomes as measured by New York Heart Association NYHA functional class and survival. 