[Atrioventricular septal defect in an adult patient: There are 'clefts' and clefts]
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Updated: Mar 24, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Nuno Moreno1, Jorge Almeida2, Mário Jorge Amorim2
1Departamento de Cardiologia, Hospital Tâmega e Sousa, Penafiel, Portugal.
Abstract:
In this report, we present the case of an adult male with severe mitral regurgitation due to an atrioventricular septal defect. Anatomical assessment by two- and three-dimensional transesophageal echocardiography was essential for detailed morphological characterization and surgical planning. The different features of a 'cleft' in an atrioventricular septal defect compared to an anterior leaflet cleft in an otherwise normal mitral valve are here discussed.
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