Table 5.

Calculated total MSNA baroreflex sensitivity (slopes), threshold, saturation, and response range using the modified Oxford method.

Calculated logistic parameters	Supine	HUT
Slope (sensitivity, max gain, AU/mmHg)	−871 ± 167	−1084 ± 220†
DBP at maximum gain (mmHg)	60 ± 3	64 ± 3†
MSNA at maximum gain (AU/min)	5503 ± 582	11722 ± 2466†
Threshold (AU/min)	917 ± 282	698 ± 223
Saturation (AU/min)	10,080 ± 1871	22877 ± 3806†
Response range (AU/min)	9173 ± 1329	21457 ± 4306†

Values are mean ± SD. HUT, head up tilt; SBP, systolic blood pressure; ^†P < 0.05 compared to the supine.