TY - JOUR AU - Naqvi, Nitha AU - McCarthy, Karen P. AU - Ho, Siew Yen PY - 2018 TI - Anatomy of the atrial septum and interatrial communications JF - Journal of Thoracic Disease; Vol 10, Supplement 24 (September 2018): Journal of Thoracic Disease (Atrial Septal Defect) Y2 - 2018 KW - N2 - Deficiencies in the septum separating the two atrial chambers are among the most common of congenital heart malformations. This article reviews the developmental aspects of the partitioning of the primitive atrium into right and left atrial chambers, the anatomical components of the atrial septum, and deficiencies that produce the various types of interatrial communications. Knowledge of the components of the true atrial septum in the developed heart clarifies the morphology of various types of interatrial communications. The oval fossa defect (also termed secundum ASD) is located within the true septum. The patent foramen ovale (PFO) is a tunnel-like passageway between the free edge of the overlapping ovale fossa valve and its muscular rim. Other defects such as superior and inferior sinus venosus defects, coronary sinus defects, and ostium primum defects lie outside the area of the true septum. UR - https://jtd.amegroups.org/article/view/19569