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 Weng^3,4, 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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