Table 1.

Demographics and Posture Study

Total Subjects (n)	54
Woman, (n)	48 (89%)
Age (years)	32 ± 10
Supine
Heart Rate (beats/min)	73 ± 10
Systolic Blood Pressure (mmHg)	108 ± 11
Diastolic Blood Pressure (mmHg)	67 ± 10
Norepinephrine (pg/mL)	223 ± 114
Epinephrine (pg/mL)	23 ± 30
Standing
Heart Rate (beats/min)	118 ± 22 *
Systolic Blood Pressure (mmHg)	113 ± 23
Diastolic Blood Pressure (mmHg)	71 ± 14
Norepinephrine (pg/mL)	832 ± 435 *
Epinephrine (pg/mL)	83 ± 110 *
Change from Supine to Standing
Heart Rate (beats/min)	45 ± 21
Systolic Blood Pressure (mmHg)	4 ± 20
Diastolic Blood Pressure (mmHg)	4 ± 13
Norepinephrine (pg/mL)	615 ± 380
Epinephrine (pg/mL)	60 ± 112

Data are presented as mean ± standard deviation. Reported P values are for paired t-test comparing supine and upright parameters.

^*P < 0.001