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Abstract #3160

The impact of heterogeneity on regurgitation classification for pulmonary artery after repaired Tetralogy of Fallot

Pei-Hsin Wu1, Hsiao-Wen Chung2, Ming-Ting Wu3, and Cheng-Wen Ko4

1Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States, 2Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan, 3Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, 4Computer Science and Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan

The degree of pulmonary regurgitation has been a determinant for re-intervention for patients with repaired TOF. However, in practice, the accurate assessment of regurgitation may be interfered by the simultaneous existence of forward flow and backward flow in any single cardiac phase, which may mislead clinical decision making. In this study, we investigated the impact of heterogeneity in blood flow profiles on guiding management and the classification of regurgitation. Preliminary results suggest that pixel-wise reexamination may be required for reclassification, especially for patients with marginal moderate regurgitant fraction value.

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