Prevalence and stability of electrocardiographic abnormalities among members of a natural community.
D000293:Adolescent; D000328:Adult; D000368:Aged; D004562:Electrocardiography; D005260:Female; D006331:Heart Diseases / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008824:Michigan; D008875:Middle Aged; D012494:Sampling Studies