title: The problem of ductal patency in prematures.
mesh_terms: D006328:Cardiac Catheterization; D004077:Digoxin / Q000627:therapeutic use; D004374:Ductus Arteriosus, Patent / Q000175:diagnosis* / Q000188:drug therapy / Q000601:surgery; D004452:Echocardiography; D004562:Electrocardiography; D006801:Humans; D007213:Indomethacin / Q000009:adverse effects / Q000627:therapeutic use; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000175:diagnosis* / Q000188:drug therapy / Q000601:surgery
chemical_list: D004077:Digoxin; D007213:Indomethacin