Table 3.

Variables in the BRS assessment

Time, min	Baseline	Post A	Post B	P (all)
Cardiovagal BRS
Slope-up, ms/mmHg	12.3 ± 1.5	6.9 ± 0.8*	6.1 ± 0.6*	<0.001
Slope-down, ms/mmHg	13.4 ± 2.0	7.2 ± 0.8*	6.6 ± 0.7*	<0.001
P (up vs. down)	0.47	0.73	0.49
Sympathetic BRS
R-BI	0.8 ± 0.04	0.9 ± 0.02	0.9 ± 0.03	0.06
R-total MSNA	0.8 ± 0.05	0.9 ± 0.02	0.9 ± 0.03	0.06
R-burst area	0.6 ± 0.1	0.7 ± 0.1	0.8 ± 0.1	0.14
T50, mmHg	80.1 ± 7.6	89.3 ± 1.9	82.9 ± 2.8	0.26
Error signal, mmHg	−5.1 ± 7.3	3.5 ± 2.7	4.4 ± 2.1	0.10

Data are presented as means ± SE; n = 10 subjects. BI, burst incidence; BMI, body mass index; BRS, baroreflex sensitivity; DBP, diastolic blood pressure; MSNA, muscle sympathetic nerve activity; R, correlation coefficient of the regression line; SBP, systolic blood pressure; T50, the midpoint pressure in the sympathetic BRS (SBRS) curve; error signal, the difference between SBRS midpoint (T50) and actual operating DBP. P (all): P value for the effect of time on the whole trial. *P < 0.05 compared with baseline by linear mixed-effects model (covariate for cardiovagal BRS; age, BMI, and SBP. Covariate for sympathetic BRS; age, BMI, and DBP).