Table 4.
Linear correlation coefficients (p-values) between muscle sympathetic nerve activity (MSNA) and hemodynamic variables during CPAP performed in healthy individuals
| MSNA parameters | DBP |
SV |
CO |
|||
|---|---|---|---|---|---|---|
| Raw | Adjusteda | Raw | Adjustedb | Raw | Adjustedb | |
| Burst incidence | −0.6 (0.01) | −0.05 (0.8) | −0.69(0.02) | −0.43 (0.09) | −0.68(0.01) | −0.45 (0.07) |
| Burst frequency | −0.41 (0.09) | −0.16(0.5) | −0.4(0.1) | −0.09 (0.7) | −0.38(0.12) | −0.13 (0.6) |
| Burst frequency Mean burst area/min | −0.43 (0.79) | −0.11 (0.68) | −0.52(0.032) | −0.32 (0.22) | −0.58(0.01) | −0.42 (0.9) |
| AP frequency AP/burst | −0.26 (0.3) | −0.17 (0.53) | −0.29 (0.25) | −0.12 (0.64) | −0.36 (0.15) | −0.36 (0.15) |
| AP/burst | −0.09 (0.71) | −0.05 (0.84) | −0.17 (0.49) | −0.19 (0.46) | −0.29 (0.24) | −0.33 (0.2) |
Data are from 7 healthy subjects (dummy variables) during baseline, CPAP 10 H2O start and CPAP 10 H2O end. DBP, diastolic blood pressure; SV, stroke volume; CO, cardiac output.
a
Adjusted for stroke volume and cardiac output.
b
Adjusted for diastolic blood pressure.