TY - JOUR T1 - The new haemodynamic definition of pulmonary hypertension: evidence prevails, finally! JF - European Respiratory Journal JO - Eur Respir J DO - 10.1183/13993003.00038-2019 VL - 53 IS - 3 SP - 1900038 AU - Marius M. Hoeper AU - Marc Humbert Y1 - 2019/03/01 UR - http://erj.ersjournals.com/content/53/3/1900038.abstract N2 - Since the 1st World Health Organization Symposium on Pulmonary Hypertension, which took place in 1973 in Geneva, Switzerland, every medical student around the world learnt, or at least should have learnt, that pulmonary hypertension (PH) is defined by a mean pulmonary arterial pressure (mPAP) ≥25 mmHg at rest (in fact, the original cut-off was >25 mmHg [1, 2], but was changed to ≥25 mmHg during the 4th World Symposium on Pulmonary Hypertension, held in 2009 in Dana Point, CA, USA [3, 4]).The proposal to redefine pulmonary hypertension by lowering the mean pulmonary artery pressure threshold from 25 mmHg to 20 mmHg is supported by strong scientific evidence http://ow.ly/eajR30nHA2E ER -