Abstract #1851

Deformation, Strain, and Pressure-Strain Elastic Modulus at the Supraceliac, Infrarenal, and Mid-Aneurysm Levels in the Aneurysmal Abdominal Aorta

Andrea Seba Les¹, Janice J. Yeung², Geoffrey M. Schultz², Robert J. Herfkens³, Ronald L. Dalman², Charles A. Taylor

¹Bioengineering, Stanford University, Stanford, CA, USA; ²Department of Vascular Surgery, Stanford University; ³Radiology, Stanford University

We used a cardiac-gated cine FIESTA sequence to measure luminal deformation, circumferential Green-Lagrange strain (E_{&[theta]&[theta]}) and pressure-strain elastic modulus (E_p) at the supraceliac (SC), infrarenal (IR), and mid-aneurysm (MA) locations in fourteen men with abdominal aortic aneurysm. E_{&[theta]&[theta]} and E_p were statisically significantly different between the SC and MA (p<0.00001 and p<0.0005) and IR and MA locations (p<0.0005 and p<0.0005). The deformations (SC, 1.670.38 mm; IR, 1.150.29 mm; MA 0.880.25 mm) were statistically significantly different between all locations. The E_p at the MA location was similar to values obtained via ultrasound.