Cardiac silhouette
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Cardiac silhouette refersrefers to the outline of the heart seen as seen on X-rayfrontal and lateral chest radiographs and forms part of the cardiomediastinal contour. The size and shape of the cardiac silhouette provide useful clues for underlying disease.
Radiographic features
From the frontal projection, the cardiac silhouette can be divided into right and left border of cardiac silhouette:borders 1:
- the right border
of cardiac silhouette isis formedprimarilyby the right atrium, with-
the superior vena cava entering superiorly and the inferior vena cava often seen at its lower margin
.
-
the superior vena cava entering superiorly and the inferior vena cava often seen at its lower margin
- the left
borderborder is formed by the left ventricle and left atrial appendage- the pulmonary artery, aortopulmonary window and aortic notch extend superiorly
Size
The cardiac silhouette is considered enlarged if the cardiothoracic ratio is greater than 50%. See main article: enlargement of the cardiac silhouette is formed primarily by the left ventricle and left atrium appendage; the pulmonary artery, aortopulmonary window and aortic notch extend superiorlyThe size and shape of cardiac silhouette provide useful cluesunderlying disease which is worth take a notice atmore information.
Size
Content required
-<p><strong>Cardiac silhouette </strong> refers to the outline of heart seen on X-ray.</p><p>From the frontal projection, the cardiac silhouette can be divided into right and left border of cardiac silhouette:<sup>1</sup></p><ul>-<li>the right border of cardiac silhouette is formed primarily by the right atrium, with the superior vena cava entering superiorly and the inferior vena cava often seen at its lower margin.</li>-<li>the left border of the cardiac silhouette is formed primarily by the left ventricle and left atrium appendage; the pulmonary artery, aortopulmonary window and aortic notch extend superiorly</li>-</ul><p>The size and shape of cardiac silhouette provide useful clues for underlying disease which is worth take a notice at. </p><h4>Size</h4><p>Content required</p><p> </p>- +<p><strong>Cardiac silhouette </strong>refers to the outline of the <a href="/articles/heart">heart</a> as seen on frontal and lateral <a href="/articles/chest-radiograph">chest radiographs</a> and forms part of the <a href="/articles/normal-contours-of-the-cardiomediastinum-on-chest-radiography">cardiomediastinal contour</a>. The size and shape of the cardiac silhouette provide useful clues for underlying disease.</p><h4>Radiographic features</h4><p>From the frontal projection, the cardiac silhouette can be divided into right and left borders <sup>1</sup>:</p><ul>
- +<li>the <strong>right border</strong> is formed by the <a href="/articles/right-atrium">right atrium</a><ul><li>
- +<a href="/articles/right-atrium"></a>the <a href="/articles/superior-vena-cava">superior vena cava</a> entering superiorly and the <a href="/articles/inferior-vena-cava-1">inferior vena cava</a> often seen at its lower margin</li></ul>
- +</li>
- +<li>the <strong>left borde</strong>r is formed by the <a href="/articles/left-ventricle">left ventricle</a> and <a href="/articles/left-atrial-appendage">left atrial appendage</a><ul><li>
- +<a href="/articles/left-atrial-appendage"></a>the <a href="/articles/pulmonary-artery">pulmonary artery</a>, <a href="/articles/aortopulmonary-window">aortopulmonary window</a> and <a href="/articles/aortic-notch">aortic notch</a> extend superiorly</li></ul>
- +</li>
- +</ul><h5>Size</h5><p>The cardiac silhouette is considered enlarged if the <a href="/articles/cardiothoracic-ratio">cardiothoracic ratio</a> is greater than 50%. See main article: <a title="Enlargement of the cardiac silhouette" href="/articles/enlargement-of-the-cardiac-silhouette">enlargement of the cardiac silhouette</a> for more information. </p><p> </p>
Tags changed:
- refs
Sections changed:
- Approach
Systems changed:
- Cardiac
- Chest
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