Electrocardiograms of twins.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003327:Coronary Disease / Q000235:genetics*; D004200:Diseases in Twins; D004562:Electrocardiography; D005190:Family; D005260:Female; D006339:Heart Rate; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000235:genetics; D010290:Parents; D011247:Pregnancy; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic