Atrial septal defect sinus venosus anatomy

Atrial Septal Defect Microchapters
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Ostium Secundum Atrial Septal Defect
Ostium Primum Atrial Septal Defect
Sinus Venosus Atrial Septal Defect
Coronary Sinus
Patent Foramen Ovale
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

• In this type of atrial septal defect the common wall between the coronary sinus and the left atrium is not developed.

• Some patients with coronary sinus atrial septal defects may also have a persistent left superior vena cava.

• A sinus venosus ASD is a type of atrial septum defect in which the defect in the septum involves the venous inflow of either the superior vena cava or the inferior vena cava.

• It involves the superior portion of septum

• Sinus venousus ASD is posterior to the fossa ovalis

• A sinus venosus ASD that involves the superior vena cava makes up 2 to 3% of all interatrial communication. It is located at the junction of the superior vena cava and the right atrium. It is frequently associated with anomalous drainage of the right-sided pulmonary veins into the right atrium (instead of the normal drainage of the pulmonary veins into the left atrium).