Two Routes to the Blue Baby Introduction Congenital cardiac defects are often easiest to understand by asking: Where is the obstruction? How is blood reaching the lungs? And where is the blood able to mix? Pulmonary Atresia and Tricuspid Atresia are both classic causes of the “blue baby”, but they produce cyanosis for different anatomical … Continue reading Pulmonary Atresia and Tricuspid Atresia