Table 2.
At-rest testing
| Area | MBF [ml/(g*min)]before RT | MBF [ml/(g*min)]2 months after RT | MBF [ml/(g*min)]8 months after RT | p-value |
| Global | 1.15 ± 0.33 | 1.14 ± 0.35 | 1.15 ± 0.25 | 1 vs 2 p = 0.841 1 vs 3 p = 0.960 |
| LAD | 1.20 ± 0.35 | 1.16 ± 0.36 | 1.11 ± 0.27 | 1 vs 2 p = 0.472 1 vs 3 p = 0.197 |
| Cx | 1.30 ± 0.42 | 1.23 ± 0.33 | 1.27 ± 0.28 | 1 vs 2 p = 0.230 1 vs 3 p = 0.735 |
| RCA | 0.99 ± 0.30 | 1.08 ± 0.45 | 1.36 ± 0.94 | 1 vs 2 p = 0.411 1 vs 3 p = 0.204 |
| Seg 1 | 1.03 ± 0.28 | 0.94 ± 0.30 | 0.93 ± 0.18 | 1 vs 2 p = 0.058 1 vs 3 p = 0.053 |
| Seg 2 | 0.81 ± 0.16 | 0.79 ± 0.21 | 0.79 ± 0.12 | 1 vs 2 p = 0.574 1 vs 3 p = 0.728 |
| Seg 3 | 0.85 ± 0.23 | 0.84 ± 0.29 | 0.89 ± 0.27 | 1 vs 2 p = 0.851 1 vs 3 p = 0.526 |
| Seg 4 | 1.01 ± 0.30 | 1.06 ± 0.42 | 1.80 ± 2.60 | 1 vs 2 p = 0.578 1 vs 3 p = 0.319 |
| Seg 5 | 1.15 ± 0.39 | 1.10 ± 0.36 | 1.15 ± 0.23 | 1 vs 2 p = 0.204 1 vs 3 p = 0.995 |
| Seg 6 | 1.25 ± 0.29 | 1.17 ± 0.33 | 1.19 ± 0.31 | 1 vs 2 p = 0.072 1 vs 3 p = 0.334 |
| Seg 7 | 1.23 ± 0.30 | 1.10 ± 0.27 | 1.09 ± 0.24 |
1 vs 2 p = 0.009 1 vs 3 p = 0.026 |
| Seg 8 | 0.88 ± 0.20 | 0.87 ± 0.24 | 0.86 ± 0.17 | 1 vs 2 p = 0.759 1 vs 3 p = 0.752 |
| Seg 9 | 0.88 ± 0.24 | 0.89 ± 0.28 | 0.98 ± 0.28 | 1 vs 2 p = 0.882 1 vs 3 p = 0.291 |
| Seg 10 | 1.07 ± 0.37 | 1.16 ± 0.54 | 1.91 ± 2.36 | 1 vs 2 p = 0.451 1 vs 3 p = 0.225 |
| Seg 11 | 1.27 ± 0.44 | 1.25 ± 0.40 | 1.36 ± 0.27 | 1 vs 2 p = 0.862 1 vs 3 p = 0.385 |
| Seg 12 | 1.40 ± 0.47 | 1.27 ± 0.31 | 1.28 ± 0.31 | 1 vs 2 p = 0.173 1 vs 3 p = 0.252 |
| Seg 13 | 1.28 ± 0.39 | 1.22 ± 0.34 | 1.13 ± 0.34 | 1 vs 2 p = 0.170 1 vs 3 p = 0.054 |
| Seg 14 | 0.99 ± 0.30 | 1.01 ± 0.35 | 1.03 ± 0.29 | 1 vs 2 p = 0.762 1 vs 3 p = 0.679 |
| Seg 15 | 1.13 ± 0.40 | 1.42 ± 0.80 | 2.07 ± 2.33 | 1 vs 2 p = 0.199 1 vs 3 p = 0.175 |
| Seg 16 | 1.44 ± 0.51 | 1.32 ± 0.31 | 1.41 ± 0.45 | 1 vs 2 p = 0.226 1 vs 3 p = 0.722 |
| Seg 17 | 1.53 ± 0.63 | 1.44 ± 0.51 | 1.38 ± 0.50 | 1 vs 2 p = 0.505 1 vs 3 p = 0.181 |
Cx, left circumflex artery; LAD, left anterior descending artery; MBF, myocardial blood flow; RCA, right coronary artery; RT, radiotherapy.
Significant MBF decreases after RT were only observed in one segment localized in the anterior mid-cavity wall supplied by the LAD. Significant differences are highlighted in bold.