title: False-negative findings in pericardial effusion using M-mode echocardiography.
abstract: M-mode echocardiography in a 3-year-old patient with suspected pericardial effusion was negative for the presence of an effusion. A subsequent 2-dimensional echocardiogram demonstrated a large effusion lateral to the right atrium and right ventricle. The reasons for the false-negative M-mode echocardiogram and a discussion of the literature are presented.
mesh_terms: D002675:Child, Preschool; D004452:Echocardiography / Q000379:methods; D005188:False Negative Reactions; D006801:Humans; D008297:Male; D010490:Pericardial Effusion