Electrocardiogram of the month.
D000293:Adolescent; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000175:diagnosis; D009203:Myocardial Infarction / Q000175:diagnosis*; D014672:Vectorcardiography