Right atrial enlargement on chest radiography (illustration)

Case contributed by Dr Vincent Tatco

The right atrial shadow (convexity in the lower half of the right mediastinal cardiovascular border) is usually:

  • not more than 50% of the cardiovascular height
  • not more than 5.5 cm from the midline

A markedly enlarged right atrium results to:

  • elongation of the right heart border (length of right atrial convexity exceeds 50% of the mediastinal cardiovascular shadow)
  • lateral bulging of the right heart border (right atrial margin is more than 5.5 cm from the midline)

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Case information

rID: 46377
Published: 3rd Jul 2016
Last edited: 14th Aug 2019
System: Chest, Cardiac
Inclusion in quiz mode: Excluded

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