It is number 2 because to manage blood pressure issues etc., it has to be managed. Sleep Apnea is a common problem whereas TAA aren't which is why it is paramount to go to a center that specializes in things like Bentall procedures etc.

As far as medical papers, there are several:
https://pubmed.ncbi.nlm.nih.gov/21442254/
https://pmc.ncbi.nlm.nih.gov/articles/PMC9019905/
https://pubmed.ncbi.nlm.nih.gov/26221978/
https://pubmed.ncbi.nlm.nih.gov/33214207/
Those articles also have citations to other apnea and aortic studies.