Atrial septal defect common or single atrium

Atrial Septal Defect Microchapters
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Ostium Secundum Atrial Septal Defect
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Common or Single Atrium
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Common or single atrium

Common (or single) atrium is a failure of development of the embryologic components that contribute to the atrial septal complex. It is frequently associated with heterotaxy syndrome

Schemating drawing showing the location of different types of ASD, the view is into an opened right atrium. HV: right ventricle; VCS: superior caval vein; VCI: inferior caval vein; 1: upper sinus venosus defect; 2: lower sinus venosus defect; 3: secundum defect; 4: defect involving coronary sinus; 5; primum defect.