Table 2. Blood pressure (BP) and heart rate (HR) changes on standing from supine position.
| Diagnosis | No. (%) | Time | ΔSystolic BP mm Hg Mean (SD) | P Value | Time | ΔHR bpm Mean (SD) | P Value |
|---|---|---|---|---|---|---|---|
| Non–OH | 97 (84.3) | ||||||
| <20 sec | −8.8 (±9.9)* | <.0001 | <20 sec | +4.4 (±7.8) | <.0001 | ||
| 1 min | −2.0 (±9.1) | .04 | 1 min | +6.0 (±6.6) | <.0001 | ||
| 3 min | ±0.9 (±8.4) | .30 | 3 min | +5.3 (+7.8) | <.0001 | ||
| COH | 14 (12.2) | ||||||
| <20 sec | −25.7 (±15.5) | <.0001 | <20 sec | +6.6 (±7.8) | .006 | ||
| 1 min | −25.8 (±13.8) | <.0001 | 1 min | +6.0 (±8.6) | .02 | ||
| 3 min | −21.4 (±14.5) | <.0001 | 3 min | +6.3 (±7.2) | .006 | ||
| IOH | 4 (3.5) | ||||||
| <20 sec | −32.8 (±13.8)† | .02 | <20 sec | +8.5 (±13.1) | .29 | ||
| 1 min | −3.0 (±6.8) | .44 | 1 min | +4.0 (±5.7) | .25 | ||
| 3 min | +3.8 (±6.6) | .34 | 3 min | +4.0 (±3.3) | .09 | ||
bpm, beats per minute; COH, classical orthostatic hypotension; HR, heart rate; IOH, initial orthostatic hypotension; Non–OH, no orthostatic hypotension; SD, standard deviation.
*
Immediate physiologic BP decrement in non–OH.
†
Two with IOH met systolic criteria, two met diastolic criteria.