Table 3. Comparison of peak systolic velocity, regurgitation fraction, and flow grading in rTOF patients and healthy controls.
| Subject | Regurgitation fraction (%) | Flow grading | ||||||
|---|---|---|---|---|---|---|---|---|
| Helix (cases) | Vortex (cases) | |||||||
| 0 | 1 | 2 | 0 | 1 | 2 | |||
| rTOF | ||||||||
| MPA | 31±17 | 25 | – | – | 11 | 12 | 2 | |
| RPA | 26±16 | 18 | 3 | 4 | 24 | 1 | – | |
| LPA | 30±15 | 24 | 1 | – | 23 | 2 | – | |
| Control | ||||||||
| MPA | 0 | 10 | – | – | 10 | – | – | |
| RPA | 0 | 9 | 1 | – | 10 | – | – | |
| LPA | 0 | 10 | – | – | 10 | – | – | |
The median flow grading with ranges (none =0, moderate =1, severe =2) in the MPA, LPA, and RPA. Group 1: the rTOF cases of severe (grade 2) flow grading, including the MPA, RPA, and LPA. Group 2: the rTOF cases of mild (grade 1) flow grading, including the MPA, RPA, and LPA. Group 3: the rTOF cases of none flow grading, including the MPA, RPA, and LPA. Group 4: none-flow grading in controls. MPA, main pulmonary artery; RPA, right pulmonary artery; LPA, left pulmonary artery; rTOF, repaired tetralogy of Fallot; MIP, maximum intensity plot; ROI, regions of interest.