I will jump in also.
I had a BAV but it was never diagnosed (despite annual physicals at places like Cooper Clinic in Dallas) until I developed endocarditis at age 55 and underwent a Ross Procedure. Beginning around age 30, I began to have aura migraines on a monthly basis. These lasted until my Ross, after which I stopped having the migraine aura or headache for about 5 years. Then they returned, and as my history shows I had to have a reoperation after 9 years because of a dilating aortic root.
To my unscientific mind, it seems interesting that the Ross Procedure, where the pulmonic valve and root were moved into the aortic position, should eliminate my auras and headaches for about 5 years. Then, once the valve became stretched because of the dilating aortic root, the auras and headaches returned!