Table 2.
Initial orthostatic hypotension
| Event | POTS with IOH (n = 20) |
Controls with IOH (n = 24) |
||||||
|---|---|---|---|---|---|---|---|---|
| Time | SBP | DBP | HR | Time | SBP | DBP | HR | |
| Baseline | 119 ± 13* | 58 ± 9 | 75 ± 13* | 110 ± 17 | 56 ± 9 | 68 ± 11 | ||
| Stand | 0 | 119 ± 15 | 54 ± 9 | 82 ± 12* | 0 | 119 ± 13 | 60 ± 11 | 73 ± 12 |
| BP nadir | 14 ± 7 | 59 ± 14* | 25 ± 10 | 110 ± 11 | 12 ± 4 | 66 ± 15 | 30 ± 10 | 104 ± 14 |
| HR peak | 21 ± 11 | 109 ± 28 | 54 ± 21 | 123 ± 13 | 23 ± 6 | 107 ± 22 | 56 ± 21 | 121 ± 13 |
| BP recovery | 30 ± 14 | 148 ± 23* | 74 ± 14* | 99 ± 14* | 26 ± 7 | 132 ± 19 | 65 ± 13 | 89 ± 17 |
| HR recovery | 43 ± 24 | 136 ± 19 | 66 ± 12 | 85 ± 14* | 43 ± 26 | 126 ± 20 | 63 ± 14 | 76 ± 15 |
| Steady trend | 97 ± 43 | 124 ± 19 | 64 ± 10 | 101 ± 11* | 90 ± 40 | 127 ± 16 | 69 ± 10 | 91 ± 15 |
Time of event, blood pressure (BP), and heart rate (HR) data are shown as means ± SD; n = no. of patients. DBP, diastolic blood pressure; IOH, initial orthostatic hypotension; POTS, postural tachycardia syndrome; SBP, systolic blood pressure.
*
P < 0.05 compared with controls.