I know where you are coming from. It's a difficult position to be in. Here is our experience for what it is worth... Older son has the BAV and dilated aorta, dilated LV, so after much discussion and on the recommendation from the geneticist, we had husband and younger son screened (I had already had a normal echo). The results were surprising when both came back with dilated aortas (though normal valves) making three out of four in our family. On the one hand, of course, good to know for necessary follow-up to track any possible further enlargement. I consider this essential given seriousness of a potential aneurysm dissecting. On the other hand insurance complications. We went with the "be on the safe side" approach, and I'm glad we did. As time goes by and followup continues, we're hoping that this does not turn out to be Familial Aortic Aneurysm Syndrome or any other connective tissue problem, BAV related or not...but given the high stakes we think it's good to know and be sure.