Sinus Venosus Atrial Septal Defect
A sinus venosus atrial septal defect is a type of atrial septal defect primarily associated with the sinus venosus.
They represent 5% of atrial septal defects.
They can occur near the superior vena cava or inferior vena cava, but the former are more common.
They can be associated with anomalous pulmonary venous connection.