Serial electrocardiographic findings in a prospective epidemiological study.
D000293:Adolescent; D000328:Adult; D000368:Aged; D004562:Electrocardiography; D004812:Epidemiologic Methods; D005260:Female; D006306:Health Surveys; D006331:Heart Diseases / Q000175:diagnosis* / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008824:Michigan; D008875:Middle Aged