Table 2. LBNP Data for Patients and Controls
|
Baseline |
-10 mm Hg |
-20 mm Hg |
-30 mm Hg |
-40 mm Hg |
|
| Patients |
|
|
|
|
|
| R-R interval |
840 ±39 |
809±44 |
740±41 |
681±47 |
616±59 |
| MAP |
96 ±4 |
94±4 |
90±4 |
86±4 |
79±5 |
| FVR |
65±8 |
70 ±8 |
80±11 |
72±7 |
116±24 |
| Calf circumference |
... |
0.0±0.2 |
0.4±0.2 |
0.8±0.2 |
1.2 ±0.2 |
| Controls |
|
|
|
|
|
| R-R interval |
937±44 |
929 ±421 |
893±511 |
714±27 |
663±75 |
| MAP |
92±3 |
90±4 |
87±6 |
85±5 |
74±7 |
| FVR |
69±11 |
87±21 |
83±16 |
107±24 |
100±30 |
| Calf circumference |
... |
0.2±0.1 |
0.7±0.2 |
1.4 ±0.3 |
1.7±0.3 |
|
MAP indicates mean arterial pressure.
Across all levels of LBNP, there was a progressive decline in R-R
interval and MAP and an increase in both FVR and calf circumference for
patients and controls (P
0.05, ANOVA). There was a group
effect (patients vs controls) for R-R interval during low-level LBNP
(P0.05, ANOVA). Post hoc analysis revealed these
differences to be at the -10 and -20 mm Hg stage
(
1 P0.05, post hoc analysis).
