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Questions and Answers
What is the most common type of atrial septal defect (ASD)?
What is the most common type of atrial septal defect (ASD)?
- Patent ductus arteriosus (PDA)
- Ostium secundum defects (correct)
- Ventricular septal defect
- Valve defects
What leads to the closure of the ductus arteriosus postnatally?
What leads to the closure of the ductus arteriosus postnatally?
- Release of Bradykinin (correct)
- Expansion of ventricles
- Muscle relaxation
- Underdevelopment of septum secundum
What is the main cause of ostium secundum defects in the atrial septum?
What is the main cause of ostium secundum defects in the atrial septum?
- Ventricular septal defect
- Overdevelopment of septum secundum
- Closure of ductus arteriosus
- Excessive resorption of septum primum (correct)
During the development of the atrial septum, which structure allows blood to bypass the foetal lungs?
During the development of the atrial septum, which structure allows blood to bypass the foetal lungs?
What is the shape of the septum primum during the development of the atrial septum?
What is the shape of the septum primum during the development of the atrial septum?
What happens to the right atrium during the development of the atrial septum?
What happens to the right atrium during the development of the atrial septum?
What is the consequence of a failure to close the ostium primum above the AV valves?
What is the consequence of a failure to close the ostium primum above the AV valves?
What marks the closure of the atrial septum post-natally?
What marks the closure of the atrial septum post-natally?
Which defect is associated with exercise intolerance in older children and adults?
Which defect is associated with exercise intolerance in older children and adults?
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