[A case of an idiopathic enlargement of the right atrium, lacking in prominent right atrium contour and mimicking left pericardial defect on the chest X ray].


A 47-year-old man was admitted for evaluation of heart murmur in 1982. On admission, two-dimensional echocardiogram showed a giant right atrium with mild tricuspid regurgitation, but a chest X ray showed no prominent right atrium contour. Echocardiographic finding at various postures and chest X ray with artificial pneumothorax indicated little likelihood… (More)


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