Hi Bitsy Girl. First, I am sorry about your husband's situation. It is definitely hard to have a loved one living with an unpredictable condition, and looking to maximize strategies is a good thing and obviously provides some control. You might find answers at http://www.ahajournals.org and look at the 2022 publication of TAD management recommendations. It is very comprehensive, and should hold the information you are looking for. It details different kinds of genetic variants, symptoms, and progression. Always remember that the blood pressure control is the foundation treatment for the aneurysm, and that other vascular anomalies/conditions can affect or fluctuate the blood pressure. (IE: sarcoidosis, vascular spasm, bicuspid valve, etc) The way I understand it, is that some genetic predispositions can lead to early dissection. There is so much they do not know yet. The Genetics are advancing really fast. Its an easy test, and is becoming the main stream standard of care. All my kids will be getting screening echoes very soon. I hope this helps. Good luck and continue surveillance and proactive approach!
Upartist