Related Experiment Video
Updated: May 8, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Giant interatrial septal aneurysm mimicking a left atrial mass
Mohammed Taleb1, Ankush Moza, Samer J Khouri
1Department of Medicine, University of Toledo Medical Center, Toledo, Ohio, USA.
Abstract:
Interatrial septal aneurysm (IASA) consists of redundant atrial septal tissue, which bulges into either the left or the right atrium. The clinical implications of this entity are not entirely clear; however, if it is associated with other cardiac abnormalities such as patent foramen ovale and atrial septal defects. It may assume significance by increasing the risk of cardioembolic events such as stroke. We present a case of an individual with giant IASA detected by transesophageal echocardiography, which was mimicking a left atrial mass on transthoracic echocardiography. This case emphasizes the superiority of transesophageal imaging over transthoracic echocardiography for this clinical entity.
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