Physical examination of a 6-year-old child reveals a heart murmur. An echocardiogram shows a ostium primum type of atrial septal defect. This defect results from failure of the
A. ostium primum to form within the septum primum
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B. ostium secundum to form within the septum primum
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C. septum primum to fuse with the endocardial cushions
D. septum primum to fuse with the septum secundum
E. septum secundum to fuse with the endocardial cushions
Answer
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Anatomy MCQs
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