Enlargement of the cardiac silhouette

Last revised by Dr Subhan Iqbal on 16 Jan 2022

Enlargement of the cardiac silhouette on a frontal (or PA) chest x-ray can be due to a number of causes 1:

Recognizing enlargement relies upon an understanding of the normal cardiomediastinal outline and normal cardiothoracic ratio

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Cases and figures

  • Case 1: with pericardial effusion
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  • Case 2: cardiomegaly
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