Here’s what I mean when I say that the wires were put together in the wrong way.
Total anomalous pulmonary venous repair (TAPVR) : is a congenital (present at birth) heart defect. It happens as the fetal heart develops during the first 8 weeks of pregnancy, causing the vessels that bring oxygen-rich (red) blood back to the heart from the lungs to become improperly connected.
Total anomalous pulmonary venous return (TAPVR) is a birth defect of the heart. In a baby with TAPVR, oxygen-rich blood does not return from the lungs to the left atrium. Instead, the oxygen-rich blood returns to the right side of the heart. Here, oxygen-rich blood mixes with oxygen-poor blood. This causes the baby to get less oxygen than is needed to the body. To survive with this defect, babies with TAPVR usually have a hole between the right atrium and the left atrium (an atrial septal defect) that allows the mixed blood to get to the left side of the heart and pumped out to the rest of the body. Some children can have other heart defects along with TAPVR, aside from the atrial septal defect. Because a baby with this defect may need surgery or other procedures soon after birth, TAPVR is considered a critical congenital heart defect. Congenital means present at birth. In a related defect, partial anomalous pulmonary venous return (PAPVR), not all of the veins have an abnormal connection. There are some abnormal connections, but one or more of the veins return normally to the left atrium. Therefore, PAPVR is not as critical as TAPVR.