Bicuspid Aortic Valve Disease and Ascending Aortic Aneurysms: Gaps in Knowledge

Table 2

Fazel-Stanford clusters.

Cluster	Extent of aortic dilatation	Extent of aortic replacement
I	Aortic root alone (13%)	Aortic root
II	Tubular ascending aorta alone (14%)	Supracommissural ascending aorta
III	Tubular ascending aorta and arch (28%)	Supracommissural ascending aorta and transverse arch
IV	Aortic root, tubular ascending aorta, and transverse arch (45%)	Aortic root, ascending aorta, and transverse arch