title: Pauses in rhythm during antiarrhythmic therapy.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use*; D004562:Electrocardiography; D006339:Heart Rate / Q000187:drug effects*; D006801:Humans; D008297:Male; D013610:Tachycardia / Q000175:diagnosis / Q000188:drug therapy* / Q000503:physiopathology
chemical_list: D000889:Anti-Arrhythmia Agents