PMC6171214_01
Chest radiograph showing cardiomegaly with right atrial enlargement.
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Chest radiography showed an abnormal cardiac silhouette with increased convexity in the lower half of the right cardiac border and cardiomegaly (Figure 1).
(a) Subxiphoid long-axis view showing abnormal dilation of the right atrium and intact interatrial septum. (b) Modified parasternal short-axis view showing the regular diameter of the pulmonary trunk. (c) Apical 4-chamber view demonstrating the compression of the right ventricle from the right atrium. (d) CW Doppler of tricuspid regurgitation.
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The pulmonary arterial pressure was normal (Figure 2).
Cardiovascular magnetic resonance (CMR) that confirmed the dilation of the right atrium without congenital heart disease.
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The pericardium was visualized without focal abnormalities or pericardial effusion (Figure 3).
(a, b) Intraoperative view showing the large dilation of the right atrium. (c) The right atrium was fully opened and resected. (d) The resected portion of the right atrium. (e, f) Atrial incision was closed as shown, reconstituting an atrial chamber of approximately normal size and configuration.
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This provided adequate reduction of the atrial size and reinforcement of the atrial wall (Figure 4).