Key points of our research methods, findings, and conclusions. After isolating 2861 patients with bicuspid aortic valve (BAV), treatment groups were defined. We subsequently examined both clinical and institutional factors associated with aortic intervention at diameters <45 mm in patients with BAV. BAVCon, International Bicuspid Aortic Valve Consortium; GenTAC, National Registry of Genetically Triggered Thoracic Aortic Aneurysms and Cardiovascular Conditions; iAVR, Isolated aortic valve replacement; AVR+AAI, combined aortic valve replacement and ascending aortic intervention; iAAI, isolated ascending aortic replacement.