EKG of the month.
D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000188:drug therapy; D005117:Cardiac Complexes, Premature / Q000175:diagnosis; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged