Woman, 30 years old. Down’s syndrome. Dyspnoea on exertion.
Which alterations do you recognize?
A – secundum ASD
B – primum ASD
C – VSD
D – sinus venosus ASD
Right answer is B: primum ASD
Ostium primum defect is a congenital malformation of the atrial septum (septum primum) contiguous with the atrioventricular valve annulus. It is embryologically related with abnormalities in endocardial cushions development; for this reason it is often combined with atrio-ventricular valves malformations.
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