Surgery>>>>>Congenital Heart DiseaseQuestion 1#The most common form of atrial septal defect (ASD) is:
A. Sinus venosus defect
B. Ostium primum defect
C. Ostium secundum defect
D. Combined primum and secundum defect
Correct Answer is
CComment:Atrial septal defects (ASDs) can be classified into three different types:
- Sinus venosus defects, comprising approximately 5 to 10% of all ASDs.
- Ostium primum defects, which are more correctly described as partial atrioventricular canal defects.
- Ostium secundum defects, which are the most prevalent subtype, comprising 80% of all ASDs.