Table 1.

Baseline and presyncope physiological data during central hypovolemia.

	Men	Women		Men	Women
	Baseline		P value	Presyncope		P value
HR (beats/min)	61 ± 5	67 ± 6	0.58	108 ± 8	105 ± 11	0.60
MAP (mmHg)	93 ± 6	97 ± 8	0.45	63 ± 4	64 ± 4	0.17
SAP (mmHg)	130 ± 9	128 ± 11	0.29	78 ± 4	80 ± 4	0.31
DAP (mmHg)	74 ± 5	76 ± 7	0.78	56 ± 3	58 ± 4	0.40
SV (mL)	99 ± 7	79 ± 3	<0.01	42 ± 5	37 ± 6	0.10
Q (L/min)	5.9 ± 0.4	5.3 ± 0.6	0.53	4.5 ± 1.2	4.7 ± 1.1	0.41
TPR (mmHg/L/min)	15.5 ± 5.0	13.3 ± 2.8	0.21	22.5 ± 10.1	22.5 ± 3.5	0.69
RRIHF (Vagal Index)	1301 ± 680	1032 ± 704	0.61	72 ± 59	54 ± 32	0.20
BRS	16.4 ± 3.8	18.7 ± 5.3	0.53	4.6 ± 3.8	6.4 ± 2.5	0.40
SAP-MSNA coherence (arbitrary units)	0.60 ± 0.08	0.72 ± 0.07	0.17	0.64 ± 0.11	0.53 ± 0.16	0.15
SAP LF (mmHg2)	6.3 ± 2.9	7.1 ± 3.7	0.23	33.8 ± 21.5	23.28 ± 8.9	0.36

All values presented as mean (± 95% CI).