Prevalence of abnormalities of electrocardiogram in old people.
D000367:Age Factors; D000368:Aged; D001281:Atrial Fibrillation / Q000175:diagnosis; D002037:Bundle-Branch Block / Q000175:diagnosis; D006332:Cardiomegaly / Q000175:diagnosis; D004562:Electrocardiography; D005260:Female; D006331:Heart Diseases / Q000175:diagnosis*; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008403:Mass Screening; D012737:Sex Factors