title: Catecholamine induced double tachycardia: case report in a child.
abstract: A six-year-old girl with syncope in association with atrial flutter-fibrillation and ventricular tachycardia produced by exercise or emotion is presented. The tachycardias could be reproduced by low-dose isoproterenol infusion and were blocked by high dose propranolol therapy. Catecholamine-induced tachyarrhythmias should be suspected in children with unexplained syncope in association with exercise or emotion.
mesh_terms: D001281:Atrial Fibrillation / Q000150:complications; D002395:Catecholamines / Q000502:physiology*; D002648:Child; D004562:Electrocardiography; D004594:Electrophysiology; D005260:Female; D006801:Humans; D005082:Physical Exertion; D011433:Propranolol / Q000627:therapeutic use; D013315:Stress, Psychological / Q000503:physiopathology*; D013575:Syncope / Q000150:complications; D013610:Tachycardia / Q000150:complications / Q000188:drug therapy / Q000209:etiology*
chemical_list: D002395:Catecholamines; D011433:Propranolol