Abstract #0005

Postoperative changes in volume flow rate in the thoracic aorta and the aortic arch branches in patients with aortic valve stenosis: a prospective serial 4D flow MRI study

Hiroki Kamada¹, Hideki Ota¹, Masanori Nakamura², Yohsuke Imai³, Wenyu Sun¹, Yoshiaki Komori⁴, Ko Sakatsume⁵, Ichiro Yoshioka⁵, Yoshikatsu Saiki⁶, and Kei Takase¹

¹Department of Diagnostic Radiology, Tohoku University Hospital, Sendai, Japan, ²Department of Electrical and Mechanical Engineering, Nagoya Institute of technology, Nagoya, Japan, ³School of Engineering, Tohoku University, Sendai, Japan, ⁴Siemens Japan K.K., Tokyo, Japan, ⁵Division of Cardiovascular Surgery, Tohoku University Hospital, Sendai, Japan, ⁶Division of Cardiovascular Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan

Postoperative hemodynamic changes in the aorta in patients with aortic valve stenosis (AS) remain unclear. Four-dimensional (4D) flow MRI was perfumed in 11 AS patients before and after aortic valve replacement (AVR). We evaluated volume flow rate and the main flow direction, setting 15 planes of the aorta and 3 planes of the arch branches. Volume flow rate significantly increased in the ascending aorta and the arch branches. The main flow direction came to match with the axial direction of the aorta. These results suggest that AVR results in more efficient blood transport to the upper body including the brain.

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