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Table 2 Radiation doses to the heart and the left ventricle

From: Early detection of subclinical left ventricular dysfunction after breast cancer radiation therapy using speckle-tracking echocardiography: association between cardiac exposure and longitudinal strain reduction (BACCARAT study)

 

Left-sided BC patients

N = 64

Right-sided BC patients

N = 15

Mean ± SD

Median (Q1-Q3)

Range

Mean ± SD

Median (Q1-Q3)

Range

Heart

 Dmean (Gy)

3.05 ± 1.31

0.87–6.37

0.65 ± 0.49

0.25–2.17

 D2 (Gy)

28.60 ± 16.85

4.16–48.87

2.57 ± 1.16

1.11–5.40

 V20 (%)

3 (1–6)

0–10

0

0

Left Ventricle

 Dmean (Gy)

6.68 ± 3.36

1.16–13.42

0.09 (0.08–0.12)

0.06–1.24

 D2 (Gy)

36.28 ± 14.81

4.49–55.48

0.38 (0.29–0.45)

0.22–2.53

 V20 (%)

11 (4–18)

0–26

0

0

  1. BC Breast Cancer, SD Standard Deviation, Q1-Q3: Interquartile range; D2 (in Gy): Minimal dose received by the most irradiated 2% of the structure volume; Dmean: Mean dose to the structure; V20 (in %): Relative volume of the structure exposed to at least 20 Gy