title: Syncope and polymorphic ventricular tachycardia.
mesh_terms: D000328:Adult; D002395:Catecholamines / Q000235:genetics*; D004562:Electrocardiography; D006801:Humans; D008297:Male; D011110:Polymorphism, Genetic; D017180:Tachycardia, Ventricular / Q000175:diagnosis*
chemical_list: D002395:Catecholamines