Anomalous muscle bundle in the right atrium; Implication to trans atrial device closure

Anomalous muscle bundle in the right atrium; Implication to trans atrial device closure

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Intracavitary muscle bands or aberrant bands have been well described Backpack in all four chambers of the heart but rarely seen thick muscular band crossing right atrium.We report a case of devisable secundum atrial septal defect with an intra-atrial anomalous muscular band, crossing right atrial wall to the rim of the secundum atrial septal defect warranting surgical closure.Keywords: Atrial HAZELNUT septal defect, Anomalous tendon, Device closure.