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Updated: Aug 6, 2025

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Can Isolated Discordant Atrioventricular Connections Survive Without Interatrial or Interventricular Shunt?
Pranav Subbaraya Kandachar1, Eapen Thomas2, Areej Al Maskary2
1Department of Cardiothoracic Surgery, Royal Hospital, Muscat, Oman.
Abstract:
Clinical presentation of isolated discordant atrioventricular connections is akin to transposition of the great arteries. In the absence of a significant intracardiac shunt, profound cyanosis is expected at birth. We report one such 5-month-old infant who had only mild cyanosis. The left-sided tricuspid valve straddled the interventricular septum with a closed interventricular communication, a type of "Double Outlet Left Atrium with three atrioventricular valves," which provided the necessary "left to right" shunt while severe regurgitation through the straddling part and a patent ductus arteriosus provided the effective pulmonary blood flow.
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