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Understanding atrial septal communications requires comprehension of the underlying development and anatomy of the IAS. 13 The atrial septum has three components: the septum primum, septum secundum, and atrioventricular (AV) canal septum.
The Redundant Septum Primum. A Redundant Septum Primum (RSP) is a normal variant typically seen in fetuses who are considered by their mothers to be very active. It can be seen as often as one in ten fetuses. That activity is not only fetal arm and leg movements, but also can include deep breathing practice movements where the diaphragm is ...
Redundant septum primum flap, also known as Foramen Ovale Aneurysm, Atrial Septal Aneurysm (ASA), or Aneurysm of Septum Primum. An atrial septum aneurysm is defined as dilatation of the atrial septum with bulging of the septum at least half the distance to the left atrial wall.
21 sty 2016 · The caudal membranous septum primum (SP) approaches the cranial muscular septum secundum (SS), thereby closing the PFO. PFO height (PH) correlates with that seen on transoesophageal...
1 gru 2010 · Occasionally, there are one or several fenestrations in the flap. These are deficiencies of the septum primum, or oval fossa defects, rather than so-called secundum atrial septal defects. The entire flap can also be redundant and aneurysmal with a tendency to be associated with a large fossa.
14 lip 2011 · The mobile foraminal flap consisted of a thin membrane ballooning into the left atrium. During ventricular filling, the flap encroached on the mitral valve annulus, but did not appear to obstruct the mitral valve flow. Greyscale appearances were indicative of redundant septum primum flap (RSPF).
1 lut 2011 · Patent foramen ovale (PFO) is a failure of the primum and secundum atrial septa to fuse postpartum. Under certain hemodynamic conditions, when there is a transient pressure gradient from the...
