Abstract #3504

Evaluation of blood flow energy loss before and after thoracic endovascular aortic repair for aneurysmal lesions using 4D Flow MRI

Takahiko Mine¹, Tetsuro Sekine², Masashi Abe¹, Shinpei Ikeda¹, Seigoh Happoh¹, Soh Ueshima¹, Takahiro Tomoda¹, Kotomi Iwata², Kumiko Mine¹, Yasuhiro Kawase³, Masahiro Fujii³, Hiromitsu Hayashi⁴, and Shin-ichiro Kumita⁴

¹Radiology, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan, ²Radiology, Nippon Medical School Musashikosugi Hospital, Kanagawa, Japan, ³Cardiovascular Surgery, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan, ⁴Radiology, Nippon Medical School Hospital, Tokyo, Japan

Synopsis

Keywords: Vascular/Vessel Wall, Vascular, TEVAR

Motivation: To survey blood flow alteration after TEVAR for TAA using 4D Flow MRI.

Goal(s): To reveal how energy loss occurs and interacts with other parameters.

Approach: Velocity and degree of energy loss at the segment from the middle of ascending aorta to the distal end of Stent-graft landing were measured. Each value gained pre and post TEVAR were statistically compared, and the relation between energy loss and velocity were evaluated.

Results: After TEVAR, the peak velocity increased at the starting point of Stent-Graft landing, and the degree of energy loss at the whole segment increased.

Impact: TEVAR facilitates aortic stiffness and increases the antegrade velocity at the segment of Stent-Graft implantation. These alterations were considered as the main factors promoting further energy loss, which may concern with cardiac afterload.

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