title: Q-T interval syndromes.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008133:Long QT Syndrome / Q000188:drug therapy / Q000503:physiopathology*; D011433:Propranolol / Q000627:therapeutic use; D013997:Time Factors
chemical_list: D011433:Propranolol