From the case:
Right atrial enlargement on chest radiography (illustration)
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/50798/annotated_viewer_json?lang=us"}
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
From the case:
Right atrial enlargement on chest radiography (illustration)
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/50799/annotated_viewer_json?lang=us"}
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)