Related Experiment Video
Updated: Oct 14, 2025

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Leftward deviation of the primary septum or dividing left atrial shelf?
Jelena Hubrechts1, Julie Pollenus2, Marc Gewillig3
1Department of Congenital and Pediatric Cardiology, University Hospital Saint-Luc, Brussels, Belgium.
Abstract:
Isolated leftward prolapse or deviation of the primary atrial septum is a rare CHD that can mimic abnormal pulmonary venous return at first sight. We present a case of a newborn infant, referred for surgical correction of totally anomalous pulmonary venous return into the right atrium, with the peri-operative finding of a leftward deviation of the superior margin of the primary atrial septum. The distinction with a dividing atrial shelf could not be confirmed with certainty. Fifty-three similar cases from the literature are incorporated. A detailed review of the current account on atrial septation is studied. The embryological and clinical features of a dividing partition of the left atrium are discussed.
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