Table 1b.
Tilt-test data of ME/CFS patients with a normal heart rate and blood pressure response during tilt testing compared to ME/CFS patients with POTS.
| NormHRBP (n = 30) |
POTS (n = 26) |
p-value | |
|---|---|---|---|
| Tilt test results: | |||
| HR supine (bpm) | 73 (13) | 80 (11) | 0.04 |
| HR end-tilt (bpm) | 89 (13) | 117 (15) | <0.0001 |
| HR post-tilt (bpm) | 69 (10) | 77 (11) | 0.009 |
| SBP supine (mmHg) | 142 (24) | 135 (10) | 0.21 |
| SBP end-tilt (mmHg) | 139 (27) | 131 (15) | 0.18 |
| SBP post-tilt (mmHg) | 138 (20) | 132 (12) | 0.20 |
| DBP supine (mmHg) | 86 (12) | 83 (9) | 0.36 |
| DBP end-tilt (mmHg) | 92 (16) | 91 (12) | 0.68 |
| DBP post-tilt (mmHg) | 83 (13) | 84 (9) | 0.80 |
| PETCO2 supine (mmHg) | 37 (4) | 35 (4) | 0.16 |
| PETCO2 end-tilt (mmHg) | 30 (5) | 27 (5) | 0.02 |
| PETCO2 post-tilt (mmHg) | 35 (4) | 32 (4) | 0.02 |
| CI supine (L/min/m2) | 2.64 (0.47) | 2.61 (0.52) | 0.83 |
| CI end-tilt (L/min/m2) | 1.90 (0.39) | 2.18 (0.40) | 0.01 |
| CI post-tilt (L/min/m2) | 2.61 (0.49) | 2.64 (0.50) | 0.81 |
| CBF supine (ml/min) | 592 (101) | 578 (95) | 0.59 |
| CBF end-tilt (ml/min) | 422 (79) | 412 (76) | 0.63 |
| CBF post-tilt (ml/min) | 506 (92) | 467 (70) | 0.08 |
CBF: cerebral blood flow; CI: cardiac index; DBP: diastolic blood pressure; HR: Heart rate; normHRBP: normal heart rate and blood pressure response; PET: end-tidal pressure; POTS: postural orthostatic tachycardia syndrome; SBP: systolic blood pressure.