title: [Early diagnosis of patent ductus arteriosus in preterm infants with contrast echocardiography].
mesh_terms: D001027:Aortography; D004374:Ductus Arteriosus, Patent / Q000175:diagnosis*; D004452:Echocardiography; D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000175:diagnosis*
vernacular_title: Diagnóstico precoz del ductus persistente en recién nacidos de pretérmino con ecocardiografía de contraste.