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Updated: Oct 2, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
A closed interatrial septum aneurysm, filled with blood, mimicking a tumour in the right atrium
I Ginon1, C Mestrallet, M Barthelet
1Service de Cardiologie, Hôpital Cardio-Vasculaire Louis Pradel, BP Lyon-Montchat, 69394 Lyon Cedex 3, France.
Abstract:
We report the case of a 70-year-old woman with rheumatic mitral stenosis and a transient ischaemic attack. Transoesophageal echocardiography revealed a cystic mass in the right atrium, hanging to the interatrial septum by a pedicle, not circulating. The mass was heterogeneous and suggested a tumour (myxoma) or a thrombus. Surgical resection showed it was an interatrial septal aneurysm, closed on itself, filled with blood. The usual causes of cardiac tumours and pathogeny of large interatrial aneurysms are discussed.
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