Pulmonary Atresia may be the main problem with a baby’s heart or one of several problems. Whether or not the right ventricle forms normally has a lot to do with how someone with Pulmonary Atresia does in the long run. In some cases, the blood flow to the lungs may be supplied by a series of small abnormal blood vessels coming from the aorta.
![Pulmonary Atresia with Hypoplastic Right Ventricle](../images/heart-atlas/pulmonary-atresia-hypoplastic-right-ventricle-560.jpg)
Pulmonary Atresia with Hypoplastic Right Ventricle
![Pulmonary Atresia with Major Aortopulmonary Collateral Arteries (PA with MAPCAs)](../images/heart-atlas/pulmonary-atresia-major-aortopulmonary-collateral-arteries-560.jpg)
Pulmonary Atresia with VSD and Major Aortopulmonary Collateral Arteries (PA/VSD with MAPCAs)