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Abstract #3222

Evaluate right ventricle-pulmonary artery interaction in patients with repaired tetralogy of Fallot by 4D flow-derived kinetic energy

Meng-Chu Chang1, Ming-Ting Wu2, Ken-Pen Weng3, Mao-Yuan Su4, Marius Menza5, Hung-Chieh Huang2, and Hsu-Hsia Peng1

1National 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 Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan, 5Medical Physics, Department of Radiology, University Hospital Freiburg, Freiburg, Germany

We quantified the kinetic energy (KE) of intraventricular RV flow (KERV,flow), PA forward flow (KEPA) and PA retrograde flow (KEPA,regur). The purpose is to establish 4D flow-derived KE-related indices for better understanding of the RV-PA interaction. We observed the interaction between RV and PA by assessing the correlation between diastolic KEPA,regur and late diastolic KERV,flow as well as between systolic KEPA and RV mean pressure. In conclusion, we verified that altered hemodynamic conditions of RV interacted with severe PR, which may lead to RV overloading pathology and adverse outcome in rTOF patients.

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