Expansion of the left atrial appendage is a distinctive cross-sectional echocardiographic feature of congenital defect of the pericardium.

@article{Ruys1983ExpansionOT,
  title={Expansion of the left atrial appendage is a distinctive cross-sectional echocardiographic feature of congenital defect of the pericardium.},
  author={F Ruys and Walter Paulus and C. Stevens and Dirk L. Brutsaert},
  journal={European heart journal},
  year={1983},
  volume={4 10},
  pages={
          738-41
        }
}
A case report of a congenital defect of the pericardium in which the cross-sectional appearance of a prominent left atrial appendage is similar to the previously reported angiographic diagnostic appearance. 
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