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Old 09-19-2011
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Heart ASD with the lower part of the septum affected

in which type of Atrial septal defect (ASD) the lower part of atrial septum is involved?
A) Septum secundum
B) Sinus venosus
C) Septum primum
D) Lutembacher syndrome

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Old 09-19-2011
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Default ? septum primum

Septum primum
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Old 09-20-2011
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Quote:
Originally Posted by m82_ghasemi View Post
in which type of Atrial septal defect (ASD) the lower part of atrial septum is involved?
A) Septum secundum
B) Sinus venosus
C) Septum primum
D) Lutembacher syndrome
B) Sinus venosus



Schemating drawing showing the location of different types of ASD, the view is into an opened right atrium. HV: right ventricle; VCS: superior caval vein; VCI: inferior caval vein; 1: upper sinus venosus defect; 2: lower sinus venosus defect; 3: secundum defect; 4: defect involving coronary sinus; 5; primum defect.
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Old 09-21-2011
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Correct Answer Answer

The correct answer is C.

Reference: BRS Pathology; table 10-3.

Sinus venosus affects the upper part of the septum near the entrance of the superior vena cava.
Septum primum affects lower part of septum
Septum secundum involves the fossa ovalis
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