RT Journal Article SR Electronic T1 Double combination therapy in patients with pulmonary arterial hypertension associated with congenital heart defects JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP p2284 VO 38 IS Suppl 55 A1 Nicole Rizzo A1 Elisa Conficoni A1 Massimiliano Palazzini A1 Enri Leci A1 Enrico Gotti A1 Gaia Mazzanti A1 Francesca Terzi A1 Alessandra Manes A1 Elena Beciani A1 Francesca Sciarra A1 Cristina Bachetti A1 Federica Sgro' A1 Nazzareno Galiè YR 2011 UL http://erj.ersjournals.com/content/38/Suppl_55/p2284.abstract AB Purpose: Patients with pulmonary arterial hypertension associated with congenital heart defects (PAH-CHD) are currently treated with targeted therapy. According to recent guidelines PAH-CHD patients with inadequate clinical response should also be treated with combination therapy (CT). We assessed the effects of double CT in a group of PAH-CHD patients.Methods: In the last 6 years, 43 adult patients with PAH-CHD (age 43±14 ys, 65% females) already treated with monotherapy were included. Twenty-nine were treated with bosentan (125 mg bid) and 14 were treated with sidenafil (20 or 25 mg tid). Twelve patients had a ventricular septal defect, 5 patients had an atrial septal defect, 5 had a patent ductus arteriosus, 8 had combined defects, and 13 had corrected defects. At baseline and after CT (with sildenafil or bosentan according with the first-line treatment) 6-minute walk test (6MWT) and right-heart catheterization were performed.Results: One patient did not perform 6MWT and another one did not undergo RHC after combination therapy. The table shows the haemodynamic and functional changes after a mean treatment period of 4.8±2.1 months of CT.View this table:Conclusions: CT improves exercise capacity and hemodynamics in patients with PAH-CHD already on monotherapy. Sequential CT appears to be an appropriate approach also in patients with PAH-CHD.