Table 2
|
Peak velocities and VTI of D wave and their respiratory variation ratios ( |
||||
| Patients |
Health subjects |
|||
|
|
|
|||
| Peak velocity (cm/s) |
VTI(mm) |
Peak velocity (cm/s) |
VTI(mm) |
|
|
|
||||
| Inspiration |
39.67 ± 26.52 |
0.0684 ± 0.0509 |
38.00 ± 9.15 |
0.0747 ± 0.0371 |
| Expiration |
34.43 ± 19.21 |
0.0580 ± 0.0354 |
24.73 ± 9.12 |
0.0454 ± 0.0243 |
| Inspiratory variation ratio (%) |
27.03 ± 16.34 |
33.72 ± 30.33 |
65.34 ± 44.38 |
86.18 ± 66.74 |
| Expiratory variation ratio (%) |
20.39 ± 13.40 |
29.98 ± 24.82 |
35.00 ± 17.96 |
45.16 ± 35.49 |
|
There were no differences in the peak velocities of D wave in inspiratory phase between the patient group and the control group (P > 0.05), but the peak velocities of D wave in expiratory phase were larger in the patient group than in the control group (P < 0.05), and the respiratory variation ratios of peak velocities of D wave were larger in the control group than in the patient group (P < 0.05); there were no differences in the VTI of D wave in respiratory cycle and its expiratory variation ratios between the patient group and the control group (P > 0.05), but the inspiratory variation ratios of VTI of D wave were larger in the control group than in the patient group (P < 0.05). | ||||
Jia et al. Cardiovascular Ultrasound 2006 4:21 doi:10.1186/1476-7120-4-21 |
||||
± s).