Key result
An adult patient presented with massive right atrial enlargement (volume > 500 ml) in the absence of tricuspid stenosis, chronic pulmonary disease, or other common associations.
Case Report (n=1)
This case report describes one of the largest right atria reported in an adult (volume >500 ml) without typical associated pathologies.
Massive right atrial enlargement without typical causes is documented; extends the reported spectrum and leaves open questions on etiology.
Massive right atrial (RA) enlargement is certainly more common in children than in adults, owing to rare congenital anomalies. Indeed, the largest description of such chamber enlargement was noted in a child, where the RA volume was reported to be 900 ml. We now report one of the largest descriptions of the RA in an adult, in absence of tricuspid stenosis and other common adult associations of RA abnormality, such as chronic pulmonary disease, severe mitral valvular pathology with pulmonary hypertension, and pulmonary embolism or infarct. The RA volume was estimated to be well over 500 ml and was notably disproportionate to that of the left atrium and either ventricle.
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Ariyarajah et al. (2008) conducted a case report in Massive right atrial enlargement (n=1). Massive right atrial enlargement was evaluated on Right atrial volume. An adult patient presented with massive right atrial enlargement (volume > 500 ml) in the absence of tricuspid stenosis, chronic pulmonary disease, or other common associations.
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