title: Junctional ectopic tachycardia in an infant: electrophysiologic evaluation.
mesh_terms: D004077:Digoxin / Q000627:therapeutic use; D004562:Electrocardiography; D006329:Heart Conduction System / Q000187:drug effects / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D008297:Male; D010672:Phenytoin / Q000627:therapeutic use; D011433:Propranolol / Q000627:therapeutic use; D013610:Tachycardia / Q000188:drug therapy / Q000503:physiopathology*
chemical_list: D010672:Phenytoin; D004077:Digoxin; D011433:Propranolol