Abstract #4544

Aortic kinetic energy in repaired tetralogy of Fallot patients with or without aortic root dilatation

Yu-Ru Yang¹, Meng-Chu Chang¹, Ming-Ting Wu², Ken-Pen Weng³, 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

Synopsis

The aortic hemodynamic flow pattern and aortic kinetic energy (KE) is less discussed for repaired tetralogy of Fallot (rTOF) patients without aortic root dilatation. We aimed to evaluate aortic KE in rTOF patients with or without aortic root dilatation. The rTOF1 patients (indexed aortic root diameter<16 mm/m²) demonstrated aortic regurgitation. Both rTOF1 and rTOF2 (indexed aortic root diameter≥16 mm/m²) patients exhibited normal aortic vorticity and decreased aortic KE. In conclusion, in rTOF patients with preserved left ventricular ejection fraction, the altered velocity-derived KE and RF can provide an indication of aortapathy progress earlier than morphological aortic dilatation and aortic vorticity.

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