Table 3.
Comparison of Electrocardiographic and Echocardiographic Parameters before and after Hemodialysis
| Before | After | P | |
|---|---|---|---|
| Hemodialysis | hemodialysis | Value | |
| Electrocardiographic findings | |||
| RR interval (ms) (median [IQR]) | 770 (264) | 738 (213) | 0.56 |
| PR interval (ms; mean ± SD) | 172.07 ± 27.97 | 171.25 ± 28.39 | 0.58 |
| P amplitude (mm) (median [IQR]) | 1.5 (0.5) | 1.5 (0.9) | 0.001 |
| QRS amplitude (mm) (median [IQR]) | 7.0 (5.5) | 9 (7) | <0.001 |
| QRS duration (ms; mean ± SD) | 87.88 ± 21.52 | 97.38 ± 20.56 | <0.001 |
| T amplitude (mm) (median [IQR]) | 2.1 (2) | 2.0 (2.2) | 0.001 |
| ST depression (mm; mean ± SD) | 0.10 ± 0.22 | 0.11 ± 0.24 | 0.30 |
| QT interval (ms; mean ± SD) | 378.21 ± 44.34 | 366.24 ± 38.63 | <0.001 |
| Corrected QT (QTc; ms; mean ± SD) | 444.87 ± 43.98 | 430.36 ± 36.84 | 0.01 |
| QT dispersion (QTd; mean ± SD) | 61.96 ± 25.06 | 74.35 ± 24.95 | <0.001 |
| Corrrected dispersion (QTcd; ms; mean ± SD) | 71.57 ± 28.40 | 86.83 ± 27.58 | <0.001 |
| Sum of QRS duration (ms; mean ± SD) | 1093.2 ± 173.2 | 1190.1 ± 159.07 | <0.001 |
| Sum of QRS amplitude (mm; mean ± SD) | 127.77 ± 38.74 | 148.77 ± 44.81 | <0.001 |
| Sum of T‐wave amplitude (mm; mean ± SD) | 32.70 ± 12.68 | 27.88 ± 11.02 | <0.001 |
| Sum of V1S + V5R (mm; mean ± SD) | 20.05 ± 9.27 | 23.05 ± 11.31 | <0.001 |
| Echocardiographic findings | |||
| LVEDD (cm; mean ± SD) | 4.99 ± 0.43 | 4.87 ± 0.42 | <0.001 |
| LVESD (cm; mean ± SD) | 3.49 ± 0.56 | 3.43 ± 0.55 | <0.001 |
| LVEDV (mL; mean ± SD) | 119 ± 24 | 112 ± 22 | <0.001 |
| LVESV (mL; mean ± SD) | 52 ± 21 | 50 ± 20 | <0.001 |
| LVEF (%; mean ± SD) | 57.00 ± 9.85 | 56.13 ± 10.45 | <0.001 |
| LA size (cm) (median [IQR]) | 3.9 (0.4) | 3.8 (0.35) | <0.001 |
| LA volume (mL) (median [IQR]) | 66 (16) | 66 (16) | <0.001 |
SD = standard deviation; IQR = interquartile range; LVEDD = left ventricular end diastolic diameter; LVESD = left ventricular end sistolic diameter; LA = left atrium; LVEF = left ventricular ejection fraction; LVEVD = left ventricular end diastolic volume; LVESV = left ventricular end sistolic volume.