Patient Dimensions and Resting Hemodynamic Data

	Reference	POTS
		Low Flow	Normal Flow
Body surface area, m2	1.72±0.08	1.73±0.13	1.76±0.08
Weight, kg	62±3	57±4	64±5
Height, cm	167±8	180±12	172±7
Heart rate, bpm	67±5	82±9*†	62±8
MAP right arm, mm Hg	78±6	84±7	79±4
MAP right leg, mm Hg	75±5	78±6	72±3
Venous occlusion plethysmography blood flow	2.6±0.7	0.7±0.2*†	2.2±0.4
LDF, pfu	6.5±1.0	2.2±1.1*†	4.9±1.3

MAP indicates mean arterial pressure.

^*P<0.05 compared with reference subjects;

^†P<0.05 compared with normal-flow subjects. A simple Bonferroni correction was applied throughout, and results are regarded as significant only if they are <0.05.