Table 4

Correlations between functional reserve parameters and exercise capacity

	Peak oxygen uptake		VE/VCO₂
	r	P value	r	P value
Ventricle
End-diastolic volume reserve	0.34	0.039	−0.20	0.143
End-systolic volume reserve	0.10	0.560	−0.02	0.879
Stroke volume reserve	0.25	0.139	−0.21	0.115
Ejection fraction (%)	0.01	0.959	−0.20	0.137
Early filling volume reserve	0.06	0.706	−0.16	0.243
Atrial filling volume reserve	0.11	0.501	−0.18	0.172
Deceleration time (ms)	−0.01	0.943	0.19	0.176
E/A ratio	0.06	0.743	−0.04	0.775
Atria
Maximal volume reserve	0.05	0.756	0.14	0.315
Minimal volume reserve	−0.08	0.626	0.11	0.407
Cyclic volume change reserve	0.25	0.134	0.01	0.969
Early emptying volume reserve	0.37	0.026	0.05	0.719
Late emptying volume reserve	0.10	0.551	−0.09	0.517
Conduit volume reserve	−0.08	0.648	−0.18	0.184

Reserve is defined as the difference between measurements during dobutamine stress and resting values. All volumes are presented as mL/m², indexed for body surface area. P values are shown unadjusted for multiple testing. No P values were considered statistically significant after adjusting for multiple testing.