Table 3.
Delta BP, hemodynamic, and MSNA responses during HSI and TC trials
| TC |
HSI |
|||
|---|---|---|---|---|
| Pre-TC | Post-TC | Preinfusion | Postinfusion | |
| 40% Handgrip exercise | ||||
| ΔSBP, mmHg | 18 ± 3 | 18 ± 3 | 18 ± 2 | 19 ± 2 |
| ΔDBP, mmHg | 15 ± 2 | 15 ± 2 | 16 ± 1 | 18 ± 1* |
| ΔMAP, mmHg | 16 ± 2 | 17 ± 2 | 16 ± 2 | 18 ± 2 |
| ΔHeart rate, beats/min | 23 ± 3 | 26 ± 3 | 20 ± 1 | 23 ± 2 |
| ΔCardiac output, l/min | 1.9 ± 0.3 | 2.1 ± 0.4 | 1.5 ± 0.1 | 1.6 ± 0.2 |
| ΔTPR, dyn⋅s⋅cm−5 | −228 ± 134 | −201 ± 122 | −104 ± 34 | −72 ± 28 |
| ΔBurst frequency, bursts/min | 13 ± 4 | 11 ± 6 | 9 ± 2 | 13 ± 3* |
| ΔBurst incidence, bursts/100 heartbeats | 10 ± 6 | 5 ± 8 | 7 ± 3 | 9 ± 4 |
| ΔTotal activity, AU/min | 1,010 ± 332 | 1,177 ± 478 | 746 ± 174 | 1,228 ± 243* |
| Postexercise ischemia | ||||
| ΔSBP, mmHg | 18 ± 3 | 20 ± 4 | 18 ± 3 | 19 ± 2 |
| ΔDBP, mmHg | 11 ± 1 | 12 ± 2 | 10 ± 1 | 12 ± 1* |
| ΔMAP, mmHg | 13 ± 2 | 15 ± 2 | 13 ± 2 | 15 ± 2 |
| ΔHeart rate, beats/min | 2 ± 1 | 4 ± 3 | 2 ± 1 | 4 ± 2 |
| ΔCardiac output, l/min | 0.8 ± 0.1 | 0.8 ± 0.2 | 0.8 ± 0.1 | 0.8 ± 0.2 |
| ΔTPR, dyn⋅s⋅cm−5 | −70 ± 92 | −5 ± 82 | 0 ± 32 | 57 ± 32 |
| ΔBurst frequency, bursts/min | 10 ± 4 | 12 ± 5 | 8 ± 2 | 9 ± 3 |
| ΔBurst incidence, bursts/100 heartbeats | 13 ± 7 | 16 ± 7 | 13 ± 3 | 12 ± 4 |
| ΔTotal activity, AU/min | 976 ± 406 | 837 ± 364 | 260 ± 148 | 398 ± 153 |
Values are means ± SE during hypertonic saline infusion (HIS) and time control (TC) trials. SBP, systolic blood pressure; DBP, diastolic blood pressure; TPR, total peripheral resistance.
*
P < 0.05 vs. preinfusion. No differences were found following TC.