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Lookup NU author(s): Professor Bob Anderson
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).
© 2023, Sultan Qaboos University. All rights reserved.This review provides an update on the morphology of the sinus venosus defect. It was earlier believed that a 'common wall' separated the right pulmonary veins from the superior caval vein. In the sinus venosus defects, this wall was absent. Current evidence shows that the superior rim of the oval fossa, rather than forming a second septum or representing a common wall, is an infolding between the walls of the caval veins and the right pulmonary veins. The sinus venosus defect is caused by the anomalous connection of one or more pulmonary veins to a systemic vein. However, the pulmonary vein(s) retain their left atrial connections, leading to a veno-venous bridge that allows interatrial shunting outside the oval fossa. True atrial septal defects are located within the oval fossa or in the anteo-inferior buttress, while sinus venosus defects, ostium defects and coronary sinus defects are morphologically distinct from them.
Author(s): Maddali MM, Anderson RH, Al Maskari SN, Kindi FA, Al Kindi HN
Publication type: Review
Publication status: Published
Journal: Sultan Qaboos University Medical Journal
Year: 2023
Volume: 23
Issue: 5
Pages: 5-9
Online publication date: 30/11/2023
Acceptance date: 14/11/2023
ISSN (print): 2075-051X
ISSN (electronic): 2075-0528
Publisher: Sultan Qaboos University
URL: https://doi.org/10.18295/SQUMJ.12.2023.075
DOI: 10.18295/SQUMJ.12.2023.075
