Echocardiography is essential for delineating the underlying cause of an enlarged cardiac silhouette, such as a giant left atrium due to mitral stenosis, even in patients with mild symptoms.
A 30-year-old woman presented with low-grade dyspnea on exertion. Chest X-ray demonstrated enlarged cardiac silhouette but was insufficient to delineate the cause. Echocardiogram revealed the cause to be the giant left atrium from mitral stenosis.
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Vohra et al. (2022) studied this question.
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