Figure 1

(A) Contrast-enhanced MRA of the aorta of a patient with Marfan syndrome. Five aortic segments are defined: ascending aorta (S1), aortic arch (S2), thoracic descending aorta (S3) suprarenal abdominal aorta (S4) and subrenal abdominal aorta (S5). Per segment, mean luminal area is defined and compared at 2-year follow-up. (B) Pulse wave propagation between the five segments defines Pulse Wave Velocity.