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Cardiology

Answer 5
  1. Atrial septal defect, secundum type is a common cardiac malformation. Atrial septal defects are found in approximately 10% of children with congenital heart disease.1 Approximately 75% of atrial septal defects are secundum type and 20% are primum type.1 Atrial septal defects are generally noncyanotic, and 70% prove to be limited to the central portion of the atrial septum, whereas 20% extend to the posterior septal wall.1

    REFERENCE
    1.
     Alexander RW, Schlant RC, eds: Hurst’s The Heart, 8th ed. New York: McGraw-Hill, 1994.Alexander RW, Schlant RC, eds: Hurst’s The Heart, 8th ed. New York: McGraw-Hill, 1994.

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