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Abstract #4117

Left ventricular-aorta energy efficiency in patients with repaired tetralogy of Fallot

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


In this study, we defined a ratio of aortic KE and LV KE to represent LV-Ao efficiency. We aimed to evaluate LV-Ao energy efficiency in rTOF patients and evaluate the relationship between LV-Ao efficiency and RV hypertrophy. The aortic root KE, LV KE, and LV-Ao efficiency in rTOF group were comparable with normal group. The indexed LV-Ao efficiency was negatively correlated with age and RV volumetric parameters. The association between LV-Ao efficiency and age and RV hypertrophy suggested that the adverse interaction between RV and LV was expanded to the aorta in rTOF patients with preserved LV function.

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