Down syndrome is most commonly associated with
ASD with ostium secundum
ASD with ostium primum
VSD
TOF
An ostium primum atrial septal defect (ASD) occurs when then atrial septum near the atrioventricular valves has a communication between the two atrium causing a left to right shunt. The image to the right shows the location of the different types of atrial septal defects while looking from the right atrium. 1 = Upper sinus venosus defect 2 = Lower sinus venosus defect 3 = Ostium secundum atrial septal defect 4 = Coronary sinus atrial septal defect 5 = Ostium Primum atrial septal defect Reference: GHAI Essential pediatrics, 8th edition
Genetic and genetic disorders