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Updated: Mar 1, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Big thrombus "sitting" in an atrial septal aneurysm
Julián Vega Adauy1, Luigi Gabrielli1,2, Samuel Córdova1
1Division of Cardiovascular Diseases, Faculty of Medicine, Pontificia Universidad Católica, Santiago, Chile.
Abstract:
A 79 year-old-man presented three episodes of upper gastrointestinal bleeding and weight loss. Endoscopy revealed bleeding and extrinsic compression at the pyloric region. Computed tomography scan showed a pancreatic tumor, peritoneal carcinomatosis, vascular infiltration, and incidentally found a partially calcified hypodense lesion of 35 mm in the left atrium, suggesting a myxoma or a thrombus. Echocardiography revealed moderate left atrium enlargement, dilated left atrial appendage with spontaneous echo contrast, moderate dilatation and dysfunction of the left ventricle, ejection fraction was 39%, and an atrial septal aneurysm in which a piriform, mass of 35×33×25 mm, was "sitting," suggesting an organized thrombus.
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