Table 1– Clinical and haemodynamic data at the time of diagnosis of pulmonary hypertension in pulmonary arterial hypertension (PAH) and chronic thromboembolic pulmonary hypertension (CTEPH)
PAHCTEPH
Subjects n866162
Age yrs45±1761±15*
Males %2940*
Time from symptoms to diagnosis yrs3.5±6.12.7±4.3*
WHO FC %
 I–II3123
 III5868
 IV119
MeanPpa mmHg54±1647±13*
Cardiac index L·min−1·m−22.6±0.92.3±0.5*
PVR Wood units12±610±5*
Pra mmHg9±58±6
6MWD m363±120317±112*
  • Data are presented as mean±sd, unless otherwise stated. WHO: World Health Organization; FC: functional class; Ppa: pulmonary artery pressure; PVR: pulmonary vascular resistance; Pra: right atrial pressure; 6MWD: 6-min walk distance. *: p<0.05 compared with PAH.