Table 3.

VCP, S₁, and S₂ values at HA and SL

	HA	SL	P value
$\mathrm{VCP}-\mathrm{\Delta }{\dot{V}}_{\mathrm{E}}/\mathrm{\Delta }\mathrm{HR}$ (ml/min)	1,325.3 ± 214.7	1,822.0 ± 371.6	<0.05
$\mathrm{VCP}-{\dot{V}}_{\mathrm{E}}/{\dot{V}}_{{\mathrm{CO}}_2}$ (ml/min)	1,315.1 ± 180.8	1,839.1 ± 359.5	<0.05
${\mathrm{S}}_{1_{{\dot{V}}_{\mathrm{E}}/\mathrm{HR}}}$ (l/bp)	1.09 ± 0.33	0.76 ± 0.32	<0.01
${\mathrm{S}}_{2_{{\dot{V}}_{\mathrm{E}}/\mathrm{HR}}}$ (l/bp)	4.8 ± 2.5	1.4 ± 0.6	<0.05
${\mathrm{S}}_{1_{{\dot{V}}_{\mathrm{E}}/{\dot{V}}_{{\mathrm{CO}}_2}}}$	0.043 ± 0.005	0.025 ± 0.001	<0.01
${\mathrm{S}}_{2_{{\dot{V}}_{\mathrm{E}}/{\dot{V}}_{{\mathrm{CO}}_2}}}$	0.114 ± 0.052	0.047 ± 0.01	<0.05
${\mathrm{S}}_2/{\mathrm{S}}_{1_{{\dot{V}}_{\mathrm{E}}/\mathrm{HR}}}$	4.5 ± 1.9	2.0 ± 0.8	NS
${\mathrm{S}}_2/{\mathrm{S}}_{1_{{\dot{V}}_E/\dot{V}{\mathrm{CO}}_2}}$	2.7 ± 1.5	1.9 ± 0.4	NS

NS, not significant.