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Abstract #1986

Interaction between pulmonary flow and myocardial motion in patients with repaired tetralogy of Fallot

Jung-Hsiu Liu1, 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 investigate the interaction between pulmonary flow and myocardial motion in patients with repaired tetralogy of Fallot (rTOF). The 4D flow MRI and tissue phase mapping were employed to quantify the pulmonary flow and myocardial motion velocity, respectively. The pulmonary retrograde flow was correlated with left ventricular (LV) peak diastolic longitudinal velocity and time-to-peak (Vz and TTPz) in rTOF patients. Pulmonary pulsatility index was correlated with diastolic RV TTPr and LV TTPz. In conclusion, the correlation between abnormal pulmonary artery flow and altered myocardial motion may provide helpful information in evaluating the cardiac function in rTOF patients.

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