title: Pulmonary vasodilation with prostacyclin in primary and secondary pulmonary hypertension.
abstract: Twenty-three patients with pulmonary hypertension underwent right cardiac catheterization and measurement of their response to a short-term infusion of prostacyclin. Pulmonary vasodilation with a greater than 20 percent fall in PVR occurred in all five patients with primary pulmonary hypertension where the predominant lesions were plexogenic; in three out of five patients where the predominant lesions were thrombotic; in three out of five patients with pulmonary hypertension and obstruction of proximal vessels; in three out of five patients with COPD; in both patients with pulmonary fibrosis due to sarcoidosis; and in the one patient with pulmonary veno-occlusive disease, where the pulmonary vasodilation was offset by a fall in arterial oxygen content. Prostacyclin is a safe and effective drug to use for testing the response of the pulmonary circulation to a vasodilator in pulmonary hypertension due to different causes. Short-term testing for a vasodilator response, with a view to instituting long-term therapy, should not be restricted to those patients with primary pulmonary hypertension due to plexogenic pulmonary arteriopathy.
authors.affiliation: Department of Respiratory Physiology, Papworth Hospital, Cambridge, England.
authors.forename: K
authors.initials: K
authors.lastname: Jones
authors.forename: T
authors.initials: T
authors.lastname: Higenbottam
authors.forename: J
authors.initials: J
authors.lastname: Wallwork
mesh_terms: D000328:Adult; D006328:Cardiac Catheterization; D011464:Epoprostenol / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000188:drug therapy* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D011651:Pulmonary Artery / Q000187:drug effects; D011652:Pulmonary Circulation / Q000187:drug effects; D013997:Time Factors; D014655:Vascular Resistance / Q000187:drug effects; D014665:Vasodilator Agents / Q000627:therapeutic use*
chemical_list: D014665:Vasodilator Agents; D011464:Epoprostenol