Baby Dennis Is Diagnosed by Echocardiogram with an Atrial Septal

Baby Dennis is diagnosed by echocardiogram with an atrial septal defect. The specific defect that baby Dennis suffers from is as the result of a reabsorption of the septum primum and/or the septum secundum being undeveloped. What specific type of atrial septal defect is baby Dennis most likely suffering from?

A) Ostium secundum defect
B) Ostium primum defect
C) Sinus venous defect
D) Coronary sinus septal defect

Correct Answer:

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