Figure 4

Increased pulmonary blood flow following fetal atrial septal stenting. (a) Pulmonary blood flow in the two cases that underwent fetal intervention to decompress the pulmonary veins, where a fetal CMR flow assessment was performed (pre) before and (post) one to two weeks after the intervention. (b) Flow curves from the left pulmonary artery in one subject that underwent fetal intervention to decompress the left atrium. The dotted line shows the flow (pre) prior to intervention and the solid line show the flow (post) one week after the intervention. HLHS-hypoplastic left heart syndrome; I/HRAS-intact or highly restrictive atrial septum.