Table 4.
Baseline two-dimensional speckle tracking echocardiographic parameters a.
| Parameter | Overall Cohort (n = 70) |
PhT (n = 26) | PBT (n = 44) | p Value |
|---|---|---|---|---|
| GLS, % | −18.82 ± 2.53 | −18.03 ± 2.78 | −19.26 ± 2.28 | 0.07 |
| GCS, % | −24.19 ± 4.36 | −24.99 ± 4.58 | −23.70 ± 4.20 | 0.25 |
| GRS, % | 56.93 ± 25.42 | 55.67 ± 14.49 | 57.70 ± 30.32 | 0.71 |
| RV S, % | −20.98 ± 3.52 | −20.78 ± 2.84 | −21.09 ± 3.88 | 0.71 |
| RV free wall S, % | −22.86 ± 4.84 | −22.32 ± 4.49 | −23.16 ± 5.05 | 0.49 |
| GLSRs, s−1 | −1.09 ± 0.21 | −1.10 ± 0.27 | −1.09 ± 0.17 | 0.88 |
| GCSRs, s−1 | −1.61 ± 0.40 | −1.69 ± 0.44 | −1.55 ± 0.37 | 0.18 |
| GRSRs, s−1 | 2.70 ± 0.80 | 2.73 ± 0.75 | 2.67 ± 0.84 | 0.78 |
| GLSRe, s−1 | 1.14 ± 0.25 | 1.17 ± 0.25 | 1.12 ± 0.25 | 0.43 |
| GCSRe, s−1 | 1.67 ± 0.45 | 1.85 ± 0.39 | 1.56 ± 0.45 | 0.006 |
| GRSRe, s−1 | −2.50 ± 0.86 | −2.78 ± 0.96 | −2.33 ± 0.75 | 0.05 |
Abbreviations: GCS, global circumferential strain; GCSRs, global circumferential systolic strain rate; GCSRe, global circumferential early diastolic strain rate; GLS, global longitudinal strain; GLSRs, global longitudinal systolic strain rate; GLSRe, global longitudinal early diastolic strain rate; GRS, global radial strain; GRSRs, global radial systolic strain rate; GRSRe, global radial early diastolic strain rate; PBT, proton beam therapy; PhT, photon beam therapy. a All values are expressed as mean ± SD.