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 (KE_RV,flow), PA forward flow (KE_PA) and PA retrograde flow (KE_PA,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 KE_PA,regur and late diastolic KE_RV,flow as well as between systolic KE_PA 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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