title: Bidirectional tachycardia.
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use; D000368:Aged; D004070:Digitalis; D005260:Female; D006327:Heart Block / Q000150:complications; D006801:Humans; D008297:Male; D008875:Middle Aged; D010946:Plants, Medicinal; D010947:Plants, Toxic; D011188:Potassium / Q000627:therapeutic use; D013610:Tachycardia / Q000139:chemically induced / Q000150:complications / Q000401:mortality
chemical_list: D000319:Adrenergic beta-Antagonists; D011188:Potassium