title: Orthostatic paroxysmal ventricular tachycardia.
mesh_terms: D000293:Adolescent; D004562:Electrocardiography; D005260:Female; D006352:Heart Ventricles; D006801:Humans; D011413:Propantheline / Q000627:therapeutic use; D000644:Quaternary Ammonium Compounds / Q000627:therapeutic use; D013614:Tachycardia, Paroxysmal / Q000175:diagnosis* / Q000188:drug therapy*
chemical_list: D000644:Quaternary Ammonium Compounds; D011413:Propantheline