title: Letter: Propranolol therapy and the Q-T interval.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000517:prevention & control*; D004341:Drug Evaluation; D006327:Heart Block / Q000151:congenital / Q000188:drug therapy*; D006801:Humans; D007275:Injections, Intravenous; D011433:Propranolol / Q000008:administration & dosage / Q000627:therapeutic use*
chemical_list: D011433:Propranolol