Egg-Shaped Heart

A globoid cardiac shadow, seen on a plain AP chest film of young children with transposition of great vessels; the mediastium is narrowed. The egg-shaped heart is characterised by a large ventricular silhouette and a small ‘waist’, and results from an abnormal location of the aorta, directly in front of the pulmonary artery, associated by physiologic necessity with a ventricular septal defect; these defects may evolve into congestive heart failure
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