Table 4.
Comparison of Doppler ultrasound examination indexes between the two groups (X ± S).
| Control group | Experiment group | t | p | |||||
|---|---|---|---|---|---|---|---|---|
| Before chemotherapy | After chemotherapy | Δ∗ | Before chemotherapy | After chemotherapy | Δ∗ | |||
| LVEF (%) | 0.62 ± 0.07 | 0.60 ± 0.05 | 0.02 ± 0.01∗ | 0.61 ± 0.08 | 0.63 ± 0.06 | 0.02 ± 0.01∗ | 0.635 | >0.05 |
| Sa (cm/s) | 8.92 ± 0.85 | 8.89 ± 0.88 | 0.03 ± 0.01∗ | 8.93 ± 0.88 | 8.92 ± 0.85 | 0.02 ± 0.01∗ | 0.752 | >0.05 |
| Ea (cm/s) | 11.32 ± 2.23 | 13.63 ± 1.89 | 2.03 ± 0.32∗ | 11.36 ± 2.20 | 15.96 ± 2.01 | 4.53 ± 0.36∗ | 6.325 | <0.05 |
| E/Ea | 5.66 ± 0.83 | 5.38 ± 0.75 | -0.25 ± 0.05∗ | 5.62 ± 0.85 | 5.26 ± 0.66 | -0.41 ± 0.08∗ | 3.256 | <0.05 |
Note: Δ represents the change of indicators after chemotherapy compared with before chemotherapy, that is after chemotherapy–before chemotherapy; ∗ represents the comparison between the study group and the control group after chemotherapy.