[Echocardiographic study of families with Marfan's syndrome: the clinical significance of echocardiographic study in the presence of normal electrocardiograms].
D000293:Adolescent; D000328:Adult; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008382:Marfan Syndrome / Q000175:diagnosis* / Q000235:genetics; D011379:Prognosis