LA8E.1 Atrial septal defect within oval fossa

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

A congenital cardiovascular malformation in which there is an interatrial communication confined to the region of the oval fossa (fossa ovalis), most commonly due to a deficiency of the primary atrial septum (septum primum) but deficiency of the septum secundum (superior interatrial fold) may also contribute.

synonyms

• Atrial septal defect within oval fossa
• Ostium secundum atrial septal defect
• Secundum atrial septal defect

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