Table 2.
Parameter, unit | Patients (n=10) | Normal* |
---|---|---|
Orthostatic Change in SBP, mmHg | −73 ± 11 | 4 ± 3 |
Orthostatic Change in HR, bpm | 12 ± 2 | 10 ± 2 |
Sinus Arrhythmia Ratio | 1.05 ± 0.02 | 1.33 ± 0.11 |
Valsalva Ratio | 1.13 ± 0.04 | 1.51 ± 0.09 |
Valsalva Phase II ΔSBP, mmHg | −80 ± 10 | −37 ± 6 |
Valsalva Phase IV ΔSBP, mmHg † | −45 ± 6 | 13 ± 7 |
Hyperventilation ΔSBP, mmHg | −36 ± 9 | −4 ± 3 |
Handgrip ΔSBP, mmHg | 6 ± 3 | 22 ± 7 |
Cold Pressor ΔSBP, mmHg | 8 ± 3 | 16 ± 3 |
Data are presented as mean ± SEM. SBP, systolic blood pressure; HR, heart rate; ΔSBP, change in systolic blood pressure compared with baseline.
Normal values are for reference only, and were obtained from healthy age-matched volunteers obtained from the Vanderbilt Autonomic Dysfunction Center database.
A negative value indicates that the blood pressure overshoot was absent.