AC- 052- 355 var en multicenter, randomiseret dobbeltblind parallelgruppeundersøgelse af Tracleer sammenlignet med placebo hos 33 patienter med alvorlig pulmonal arteriel hypertension, som var i samtidig behandling med epoprostenol.
AC-052-355 was a multi-centre, randomised, double-blind, parallel-group trial of Tracleer versus placebo in 33 patients with severe pulmonary arterial hypertension who were receiving concomitant epoprostenol therapy.