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  2. Atrial septal defect - Wikipedia

    en.wikipedia.org/wiki/Atrial_septal_defect

    As a group, atrial septal defects are detected in one child per 1500 live births. PFOs are quite common (appearing in 10–20% of adults), but when asymptomatic go undiagnosed. ASDs make up 30 to 40% of all congenital heart diseases that are seen in adults. [58] The ostium secundum atrial septal defect accounts for 7% of all congenital heart ...

  3. Wikipedia : Osmosis/Atrial septal defect

    en.wikipedia.org/.../Atrial_septal_defect

    Most ASD cases are due to the ostium secundum which can happen when the secundum septum doesn’t grow enough during development This actually accounts for about 10-15% of all congenital heart defects and is the most common congenital heart defect in adults. Fewer ASD cases are due to the ostium primum, where the “first opening” or ostium ...

  4. Foramen secundum - Wikipedia

    en.wikipedia.org/wiki/Foramen_secundum

    Foramen secundum atrial septal defects are the most common atrial septal defects. This defect can arise as a result of defects of the septum primum and the septum secundum. For the septum primum, the problem can arise as a result of excess resorption of the septum during the process of apoptosis in order to form the foramen secundum.

  5. Congenital heart defect - Wikipedia

    en.wikipedia.org/wiki/Congenital_heart_defect

    Defects in the interatrial septum or the interventricular septum allow blood to flow from the left side of the heart to the right, reducing the heart's efficiency. [47] Ventricular septal defects are collectively the most common type of CHD, [48] although approximately 30% of adults have a type of atrial septal defect called probe patent ...

  6. Ostium primum atrial septal defect - Wikipedia

    en.wikipedia.org/wiki/Ostium_primum_atrial...

    The ostium primum atrial septal defect is a defect in the atrial septum at the level of the tricuspid and mitral valves. This is sometimes known as an endocardial cushion defect because it often involves the endocardial cushion, which is the portion of the heart where the atrial septum meets the ventricular septum and the mitral valve meets the tricuspid valve.

  7. Holt–Oram syndrome - Wikipedia

    en.wikipedia.org/wiki/Holt–Oram_syndrome

    About 75 percent of individuals with Holt–Oram syndrome also have congenital heart problems, [2] with the most common being defects in the tissue wall between the upper chambers of the heart (atrial septal defect) or the lower chambers of the heart (ventricular septal defect). [3]

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