Assessment of cardiovascular effects to theophylline in premature newborns by means of serial echocardiography.
D001049:Apnea / Q000188:drug therapy*; D004452:Echocardiography; D006439:Hemodynamics / Q000187:drug effects*; D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000188:drug therapy*; D013806:Theophylline / Q000494:pharmacology*
D013806:Theophylline