Atrial septal defect classification
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Claudia Hochberg, M.D.
Associate Editors-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Keri Shafer, M.D. [3]; Priyamvada Singh, MBBS [[4]]
Assistant Editor-In-Chief: Kristin Feeney, B.S. [[5]]
Overview
During fetal development, the septal wall may fail to fuse causing an atrial septal defect to arise. There are many types of this malformation including: ostium primum, ostium secundum, patent foramen ovale, sinus venosus, and common or single atrium.
Types of atrial septal defects
There are many types of atrial septal defects. They are differentiated from each other by whether they involve other structures of the heart and how they are formed during the developmental process during early fetal development. These defects include: