title: Electrocardiogram of the month.
authors: UAMS Division of Cardiology, Little Rock, Arkansas.
authors: J P
authors: JP
authors: Lindemann
mesh_terms: D001145:Arrhythmias, Cardiac / Q000188:drug therapy / Q000503:physiopathology*; D001283:Atrioventricular Node / Q000503:physiopathology; D004077:Digoxin / Q000627:therapeutic use; D004562:Electrocardiography / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D014700:Verapamil / Q000627:therapeutic use
chemical_list: D004077:Digoxin; D014700:Verapamil