Spectral data of 42 patients with primary SS and 30 healthy controls during supine rest and orthostatic challenge. All values are presented as mean (SD)
| Supine rest | 60 degree tilt | |||||
|---|---|---|---|---|---|---|
| 2A | Patients | Controls | p Value | Patients | Controls | p Value |
| IBI | 852 (131) | 906 (115) | NS | 747 (105) | 795 (117) | <0.05 |
| HR | 70 | 66 | NS | 80 | 76 | <0.05 |
| CVHR | 4.71 (2.4) | 5.16 (1.7) | NS | 5.15 (2.5) | 4.88 (1.5) | NS |
| MFB HR | 5.57 (1.2) | 6.35 (0.9) | <0.05 | 6.08 (1.1) | 6.38 (1.0) | NS |
| HFB HR | 6.05 (1.5) | 6.16 (0.7) | NS | 5.43 (1.3) | 5.53 (0.8) | NS |
| SBP | 134 (21.6) | 123 (15.6) | NS | 142 (21.8) | 124 (17.3) | <0.01 |
| CVSBP | 3.52 (1.3) | 4.84 (2.3) | <0.01 | 5.10 (2.0) | 5.26 (1.5) | NS |
| MFB SBP | 4.89 (0.8) | 5.19 (0.8) | NS | 6.27 (0.7) | 6.14 (0.9) | NS |
| DBP | 66 (8.9) | 69 (10.8) | NS | 75 (12.o) | 76 (10.8) | NS |
| CVDBP | 4.32 (1.5) | 4.19 (1.5) | NS | 6.37 (3.0) | 4.33 (1.0) | <0.01 |
| BRS MFB | 8.93 (5.0) | 12.69 (8.7) | NS | 4.40 (2.1) | 6.79 (2.8) | <0.01 |
| Patients | Controls | |||||
|---|---|---|---|---|---|---|
| 2B | Rest | Tilt | p Value | Rest | Tilt | p Value |
| IBI, interbeat interval (ms); HR, heart rate (beats/min); CVHR, variation coefficient heart rate; MFB HR, log power mid-frequency band heart rate; HFB HR, log power high-frequency band heart rate; SBP, systolic blood pressure (mm Hg); CVSBP, variation coefficient systolic blood pressure; MFB SBP, log power mid-frequency band systolic blood pressure; DBP, diastolic blood pressure (mm Hg); CVDBP, variation coefficient diastolic blood pressure; BRS MFB, baroreflex sensitivity index (mid-frequency band); NS, non-significant. | ||||||
| IBI | 852 (131) | 747 (105) | <0.001 | 906 (115) | 795 (117) | <0.001 |
| HR | 70 | 80 | <0.001 | 66 | 76 | <0.001 |
| CVHR | 4.71 (2.4) | 5.15 (2.5) | NS | 5.16 (1.7) | 4.88 (1.5) | <0.001 |
| MFB HR | 5.57 (1.2) | 6.08 (1.1) | <0.01 | 6.35 (0.9) | 6.38 (1.0) | NS |
| HFB HR | 6.05 (1.5) | 5.43 (1.3) | <0.01 | 6.16 (0.7) | 5.53 (0.8) | <0.001 |
| SBP | 134 (21.6) | 142 (21.8) | <0.001 | 123 (15.6) | 124 (17.3) | NS |
| CVSBP | 3.52 (1.3) | 5.10 (2.0) | <0.001 | 4.84 (2.3) | 5.26 (1.5) | NS |
| MFB SBP | 4.89 (0.8) | 6.27 (0.7) | <0.001 | 5.19 (0.8) | 6.14 (0.9) | <0.001 |
| DBP | 66 (8.9) | 75 (12.0) | <0.001 | 69 (10.8) | 76 (10.8) | <0.001 |
| CVDBP | 4.32 (1.5) | 6.37 (3.0) | <0.001 | 4.19 (1.5) | 4.33 (1.0) | NS |
| BRS MFB | 8.93 (5.0) | 4.40 (2.1) | <0.001 | 12.69 (8.7) | 6.79 (2.8) | <0.001 |