Patent ducts arteriosus in premature infants. Incidence, relation to pulmonary disease and management.

Birth Weight Cardiac Catheterization Chronic Disease Ductus Arteriosus, Patent/complications,diagnosis,epidemiology,mortality,surgery,therapy Female Follow-Up Studies Heart Auscultation Heart Failure/complications Humans Infant Infant, Newborn Infant, Premature, Diseases Lung Diseases/complications Male Prognosis Respiratory Distress Syndrome, Newborn/complications,therapy Sex Factors