Table 2.
MSNA and hemodynamic measurements at baseline and during CPT and recovery
| Baseline | CPT, minute 1 | CPT, minute 2 | Recovery | ANOVA (F ratio; P value) | |
|---|---|---|---|---|---|
| MSNA burst frequency, bursts/min | 7.6 ± 1.6 | 20.5 ± 3.9* | 31.7 ± 4.7* | 11.8 ± 3.3 | 27.4;<0.0001 |
| MSNA bursts incidence, bursts/100 heartbeats | 13.4 ± 2.8 | 30.1 ± 5.8* | 48.1 ± 6.6* | 20.4 ± 5.5 | 20.1;<0.0001 |
| Heart rate, beats/min | 59 ± 2 | 70 ± 2* | 65 ± 2* | 58 ± 2 | 20.8;<0.0001 |
| SBP, mmHg | 125 ± 2 | 131 ± 3* | 145 ± 4* | 130 ± 2 | 23.7;<0.0001 |
| DBP, mmHg | 72 ± 1 | 77 ± 2* | 86 ± 2* | 74 ± 2 | 50.2;<0.0001 |
| BA diameter, mm | 3.93 ± 0.17 | 3.90 ± 0.17 | 3.81 ± 0.16* | 3.85 ± 0.16 | 2.9;0.049 |
| BA mean blood velocity, cm/s | 3.2 ± 0.3 | 2.5 ± 0.2* | 2.5 ± 0.2* | 3.5 ± 0.4 | 8.8;<0.0001 |
| BA antegrade velocity, cm/s | 3.6 ± 0.2 | 3.1 ± 0.2* | 2.8 ± 0.2* | 3.8 ± 0.3 | 8.5;<0.0001 |
| BA retrograde velocity, cm/s | 0.42 ± 0.13 | 0.53 ± 0.13 | 0.35 ± 0.10 | 0.28 ± 0.11* | 6.6;0.001 |
Values are means ± SE. CPT, cold pressor test.
*
Significantly different from baseline.