Table 2.
Effects of LBNP
| Hemodynamics | MRI | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| SBP (mmHg) | DBP (mmHg) | MAP (mmHg) | PP (mmHg) | HR (bpm) | RVR (mL/min/mmHg) | CR2* (s−1) | MR2* (s−1) | RBF (mL/min) | |
| Baseline | 118 (3.3) | 69 (2.1) | 85 (2.0) | 50 (3.5) | 71 (3.1) | 0.076 (0.0063) | 20.3 (1.1) | 28.6 (1.0) | 1152 (75) |
| LBNP − 15 mmHg | 114 (2.8) | 68 (2.3) | 83 (2.1) | 47 (2.7) | 76 (2.6) | 0.083 (0.0057) | 19.6 (0.84) | 28.0 (1.8) | 1039 (72) |
| LBNP − 30 mmHg | 115 (2.6) | 72 (1.9) | 86 (1.9) | 43 (2.3)* | 90 (2.6)* | 0.094 (0.0067)* | 19.8 (0.40) | 28.0 (1.2) | 950 (63)* |
| Recovery | 116 (2.9) | 70 (2.0) | 85 (2.0) | 45 (2.6) | 72 (2.3) | 0.088 (0.0073) | 19.6 (0.56) | 26.5 (0.88) | 1012 (68) |
bpm beats per minute, CR2* cortical R2*, HR heart rate, MAP mean arterial pressure, MR2* medullary R2*, MRI magnetic resonance imaging, PP pulse pressure, RBF renal blood flow, RVR renal vascular resistance
*Indicates significant response to LBNP