title: Bidirectional tachycardia: a case.
mesh_terms: D000368:Aged; D004077:Digoxin / Q000627:therapeutic use*; D004562:Electrocardiography; D005260:Female; D006333:Heart Failure / Q000150:complications*; D006801:Humans; D013610:Tachycardia / Q000175:diagnosis / Q000209:etiology*
chemical_list: D004077:Digoxin