title: Echocardiographic study of pericardial effusion.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D004452:Echocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010490:Pericardial Effusion / Q000175:diagnosis*