Types of ASD (Atrial septal defect)

 Atrial septal defect (ASD) is a defect in the interatrial septum permitting free communication of blood between the atria. Based on the location of the septal defect ASD can be classified into four types.

1. Ostium secundum ASD is the commonest type of ASD which involves the fossa ovalis, in the mid-septal region. 20% of these cases are associated with mitral valve prolapse (MVP). 
2. Ostium primum type of ASD is rare, defect is near AV valves. The AV valves may also be deformed.
3. Sinus venosus type is also rare, defect is seen high in the atrial septum near the entry of superior venacava (SVC).
4. Coronary sinus type of ASD

Lutembacher's syndrome is a rare combination of ASD and rheumatic mitral stenosis.

Read related topics -ASD

1. Management of ASDatrial septal defect
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3. What are the complications of ASD ?
4. What are the investigation findings in ASD (atrial septal defect) ?
5. What is the Hemodynamics in ASD ?
6. What are the Murmurs in atrial septal defect?
7. Why there is Fixed split in ASD
8. How will you clinically diagnose atrial septal defect?
9. Development of interatrial septum and its defect (ASD)
10. Development of interatrial septum