title: Letter: E.C.T. and cardiac arrhythmia.
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000009:adverse effects; D001145:Arrhythmias, Cardiac / Q000209:etiology*; D004565:Electroconvulsive Therapy / Q000009:adverse effects*; D006801:Humans
chemical_list: D000319:Adrenergic beta-Antagonists