title: EKG of the month.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000188:drug therapy; D001919:Bradycardia / Q000175:diagnosis / Q000188:drug therapy; D004562:Electrocardiography; D005080:Exercise Test; D006801:Humans; D008297:Male; D008875:Middle Aged; D011342:Procainamide / Q000008:administration & dosage
chemical_list: D011342:Procainamide