Right atrial aneurysm (RAA) is a rare congenital anomaly with a diverse clinical spectrum. We present a case of antenatal detection of a giant RAA. The infant had 3 episodes of staring spells presumed to be thrombo-embolic phenomena originating from the RAA. The infant underwent successful RAA resection with preservation of the right coronary artery that was displaced from its usual position due to invagination of the RAA in the subepicardial space of the right atrio-ventricular groove.
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