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Abstract #2108

Aortic Wall Shear Stress and Oscillatory Shear Index in Patients with Repaired Tetralogy of Fallot

Qing-Xiao Zhang1, Meng-Chu Chang1, Ming-Ting Wu2, Ken-Pen Weng3,4, and Hsu-Hsia Peng1
1Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan, 2Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, 3Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, 4Department of Pediatrics, National Yang-Ming University, Taipei, Taiwan

We aimed to explore the difference of the wall shear stress (WSS) and oscillatory shear index (OSI) between control and rTOF patients. The rTOF patients were divided into rTOF1and rTOF2 groups according to their indexed right ventricular end-systolic volume (RVESVi). The rTOF patients presented decreased WSSaxial and OSIcirc in the ascending aorta. In rTOF2 group the WSSaxial and OSIcirc correlated with resistance index and flow velocity. In conclusion, higher resistance index and slower flow velocity correlated with decreasd WSSaxial and OSIcirc in rTOF2. The deceasing OSIcirc may slightly improve the stress condition of vascular wall.

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