Table 3.
Effects of acute sodium loading
| Preinfusion | Postinfusion | |
|---|---|---|
| Biological variables | ||
| Serum potassium, mmol/l | 3.95 ± 0.11 | 4.01 ± 0.15 |
| Serum chloride, mmol/l | 104.2 ± 1.0 | 108.0 ± 0.8* |
| Hemoglobin, g/dl | 12.8 ± 0.5 | 12.6 ± 0.5 |
| Hematocrit, % | 39.6 ± 1.5 | 38.1 ± 1.5* |
| SBP, mmHg | 112 ± 3 | 116 ± 3* |
| DBP, mmHg | 65 ± 2 | 64 ± 2 |
| MAP, mmHg | 79 ± 3 | 81 ± 2 |
| HR, beats/min | 57 ± 2 | 59 ± 2* |
| Respiration rate, min−1 | 14.5 ± 1.0 | 14.9 ± 0.7 |
| cBRS | ||
| Up sequences, ms/mmHg | 23.7 ± 4.2 | 22.0 ± 62.7 |
| Down sequences, ms/mmHg | 27.0 ± 4.7 | 28.6 ± 4.2 |
| HRV | ||
| SDNN, ms | 66.6 ± 6.3 | 73.6 ± 6.4 |
| RMSSD, ms | 63.2 ± 8.9 | 63.2 ± 8.0 |
| HF power, ms2 | 1,614 ± 472 | 1,569 ± 425 |
Values are means ± SE. cBRS, cardiovagal baroreflex sensitivity; DBP, diastolic blood pressure; HF, high frequency; HR, heart rate; HRV, HR variability; MAP, mean arterial pressure; RMSSD, root mean square of successive differences in R-R interval; SBP, systolic blood pressure; SDNN, SD of normal-to-normal R-R intervals.
*
P < 0.05.