Patient with inoperable chronic thromboembolic pulmonary hypertension showing a typical aspect of subpleural hypoperfusion at the capillary phase of pulmonary angiography. Patient with inoperable chronic thromboembolic pulmonary hypertension showing a typical aspect of subpleural hypoperfusion at the capillary phase of pulmonary angiography. Image kindly provided by P. Dartevelle, French National Reference Centre of Pulmonary Hypertension, Hôpital Bicêtre, Le Kremlin-Bicêtre, France. Gérald Simonneau et al. Eur Respir Rev 2017;26:160112 ©2017 by European Respiratory Society