RT Journal Article SR Electronic T1 Effect of macitentan on haemodynamics in SERAPHIN, a randomised controlled trial in pulmonary arterial hypertension (PAH) JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP P4060 VO 42 IS Suppl 57 A1 Olivier Sitbon A1 Richard Channick A1 Marion Delcroix A1 Nazzareno Galiè A1 Hossein-Ardeschir Ghofrani A1 Pavel Jansa A1 Franck-Olivier Le Brun A1 Sanjay Mehta A1 Loïc Perchenet A1 Tomás Pulido A1 B.K.S. Sastry A1 Rogério Souza A1 Adam Torbicki A1 Lewis Rubin A1 Gérald Simonneau YR 2013 UL http://erj.ersjournals.com/content/42/Suppl_57/P4060.abstract AB Macitentan's effect on haemodynamics in PAH patients was assessed at selected centres in the SERAPHIN study (NCT00660179). 742 patients were randomised to placebo, macitentan 3 or 10mg q.d. Background phosphodiesterase-5 inhibitors and oral/inhaled prostanoids were allowed. 187 patients had right heart catheterisation at randomisation and Month 6. Placebo (n=68), macitentan 3mg (n=62) and 10mg (n=57) groups were well balanced for baseline haemodynamics with median pulmonary vascular resistance (PVR), 800, 785, 789 dyn·sec/cm5 and cardiac index (CI) 2.49, 2.23, 2.47 L/min/m2. On average, all cardiopulmonary haemodynamics improved at Month 6 with macitentan and worsened with placebo. Subgroup analyses by background PAH therapy (naïve or treated) and baseline WHO FC I/II or III/IV showed that beneficial treatment effects with macitentan remained almost entirely significant for PVR and CI.View this table:Treatment effect on PVR (%)* and CI (L/min/m2)Macitentan improved cardiopulmonary haemodynamics in PAH patients with consistent improvements in PVR and CI irrespective of background PAH therapy and baseline WHO FC.