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Rarely, all components of the atrial septum, including the septum primum, septum secundum, and AV canal septum are absent, resulting in a common atrium. 28,40-42 This is typically seen in association with heterotaxy syndrome. Some remnants of tissue might still be present in these patients.
21 sty 2016 · Atrial septal aneurysm (ASA) is a focal outpouching of the redundant interatrial septum of at least 10 mm from the midline position with a base of at least 10 mm (Refs 55,173). The dashed...
17 paź 2018 · Diagnosis of interatrial septal pathology is often challenging because the clinical presentations of these diseases are often nonspecific, and accurate diagnosis from common imaging modalities, like echocardiography, can suffer from technical limitations.
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.
1 wrz 2001 · The flap of the foramen ovale (septum primum) closes against the atrial septum (septum secundum), with fusion usually occurring within the first two years of life. Fusion is incomplete in about 25% of people, resulting in an oblique slit-like defect.
Under normal physiological conditions, the higher left atrial pressure gently pushes the thin septum primum against the septum secundum and, except for very brief periods in each cardiac cycle, seals the potential opening of the PFO.
1 lut 2011 · Key Points. Patent foramen ovale (PFO) is a normal fetal communication between the right and left atria that persists postpartum. PFOs are present in 20–34% of the population, but they pose no...