Anjali Vaidya, MD, FACC, FASE, FACP, Director of the Advanced Pulmonary Hypertension, Right Heart Failure & CTEPH Program at Temple University Hospital, provided perspective for a Healio article on the U.S. Food and Drug Administration (FDA) filing acceptance of a new drug application for ralinepag, a once-daily oral prostacyclin for the treatment of pulmonary arterial hypertension (PAH).