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Abstract #2700

Evaluate Radial and Longitudinal Myocardial Motion Velocity in Left and Right Ventricles for Repaired Tetralogy of Fallot Patients by Phase-Contrast MRI

Meng-Chu Chang 1 , Ming-Ting Wu 2 , Marius Menza 3 , Mao-Yuan Su 4 , Hung-Chieh Huang 2 , and Hsu-Hsia Peng 5

1 Interdisciplinary Program of Nuclear Science, National Tsing Hua University, Hsinchu, Taiwan, 2 Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, 3 Medical Physics, Department of Radiology, University Hospital Freiburg, Freiburg, Germany, 4 Department of Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan, 5 Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan

Tetralogy of Fallot (TOF) patients frequently encounter residual pulmonary regurgitation (PR) after repaired surgery. To prevent irreversible heart failure, repaired TOF (rTOF) patients have to undergo pulmonary valve replacement (PVR) to relieve PR and its pathological response to myocardium. This study aims to evaluate radial and longitudinal myocardial velocities and septal curvature for rTOF by phase-contrast MRI. Prior to significant impaired left ventricular ejection fraction, the quantified indices can provide satisfied information to assess regional abnormal myocardial function and flat curvature of septum in rTOF. Those indices might be helpful for patient managements regarding the timing of undergoing PVR surgery.

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