PMC3621222_01
Snoopy sign. Lung tissue between aorta and pulmonary artery
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F1
The Snoopy's sign was present [Figure 1].
Prominent anterior clear space
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F2
The anterior clear space was prominent [Figure 2].
Interposition of the lung between the aorta and pulmonary artery
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F3
A repeat chest CT with contrast showed no significant change from the previous CT scan, showing the heart to be abnormally rotated to the left side of the chest [Figures 3 and 4].
Levoposition of the heart
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F4
A repeat chest CT with contrast showed no significant change from the previous CT scan, showing the heart to be abnormally rotated to the left side of the chest [Figures 3 and 4].
Seagulls or ghosting artifact. Computed tomography scan of the chest with contrast showing false impression of pulmonary embolism caused by motion artifact of the heart in the absence of a pericardium
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F5
An echocardiogram confirmed the abnormal orientation of the heart, with the apex of the left ventricle sitting deeply in the left chest and a moderate amount of pulmonary hypertension [Figure 5].
Normal Computed tomography scan of the chest with IV contrast for comparison
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F6
The misdiagnosis of pulmonary embolism was attributed to the motion artifact of the swinging heart (Figure 6 showing abnormal CT scan compared with a normal chest CT; Figure 7).
(a) Shows position of the probe for the apical four-chamber view of a 2-D echocardiogram, (b) a normal 2-D echo with interventricular septum pointing toward the probe, (c) 2-D echo in a patient with congenital absence of pericardium, with left ventricle flopped to the left side and interventricular septum pointing to the left side
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F7
The misdiagnosis of pulmonary embolism was attributed to the motion artifact of the swinging heart (Figure 6 showing abnormal CT scan compared with a normal chest CT; Figure 7).