Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Septum, interatrial
Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026
Septum, interatrial: The wall separating the upper chambers (the atria) of the heart. A hole in the interatrial septum is termed an atrial septal defect (ASD).