Table 3.
Comparison of the heart’s exposure to radiation between patients with and without cardiac events
| CE (n = 13) |
Non-CE (n = 67) |
P value | |
|---|---|---|---|
| Heart volume (mL) | 679 (583–770) | 660 (566–726) | 0.5356 |
| Heart Dmax (cGy) | 6164 (6124–6261) | 6092 (6030–6200) | 0.0363 |
| Heart Dmin (cGy) | 46 (15–132) | 35 (10–80) | 0.5393 |
| Heart Dmean (cGy) | 3364 (2673–3882) | 2920 (1763–3398) | 0.0446 |
| Percentage of the heart volume receiving more than indicated irradiation dose | |||
| V1500 cGy (%) | 71.9 (55.8–82.6) | 65.7 (40.6–75.0) | 0.0976 |
| V3000 cGy (%) | 61.1 (47.0–70.0) | 52.9 (28.9–64.1) | 0.0669 |
| V4000 cGy (%) | 53.1 (41.3–62.3) | 41.9 (20.9–53.4) | 0.0266 |
| V5000 cGy (%) | 30.1 (20.8–37.2) | 19.4 (10.3–28.2) | 0.0167 |
| Absolute heart volume receiving more than indicated irradiation dose | |||
| V1500 cGy (mL) | 556 (327–627) | 411 (272–498) | 0.0699 |
| V3000 cGy (mL) | 432 (269–536) | 341 (203–428) | 0.0357 |
| V4000 cGy (mL) | 360 (222–468) | 255 (142–364) | 0.0202 |
| V5000 cGy (mL) | 193 (115–294) | 134 (66–187) | 0.0084 |
Data are expressed as median (interquartile range). CE, cardiac event; Dmax, maximum dose; Dmin, minimum dose; Dmean, mean dose