Selexipag Therapy Effective For Pulmonary Hypertension Patients Pulmonary arterial hypertension associated with connective tissue disease (PAH-CTD) presents a significant clinical challenge, with affected patients often experiencing worse outcomes than those with idiopathic pulmonary arterial hypertension (IPAH). Although earlier short-term studies suggested a limited response to PAH-specific therapies in PAH-CTD patients, recent