8) is certainly enlarged, but is likely not an indication
for surgery just yet. In adult-sized patients, we wait for a diameter of approximately 4.5 cm with BAV for intervention. This may be more associated with an absolute dimension and not with the actual Z score, as from a physics standpoint, the likelihood of aortic rupture is greater with that size. It will certainly need to be observed over time to ensure that it isn't getting too big.