Table
4.
Correlation coefficients
(r) between the slope of the relationship between cardiac output and
oxygen uptake (CO slope) and hemodynamic and exercise variables.
CHF
Subjects
CO Slope
p value
Peak
VO2
.51
<.001
Peak
CO
.48
.001
Peak
CI
.54
<.001
Peak
VET
.22
.18
VE/VCO2
Slope
-.08
.61
OUES
-.07
.66
NYHA
Class
.05
.75
EF
-.02
.89
Normal
Subjects
CO Slope
p value
Peak
VO2
.17
.59
Peak
CO
.79
<.002
Peak
CI
.81
.001
Peak
VET
-.50
.10
VE/VCO2
Slope
-.36
.25
OUES
.58
.05
EF
.28
.40
VO2 = oxygen
uptake; CO = cardiac output; CI = cardiac index; VET = ventricular ejection time; OUES = oxygen uptake efficiency
slope; NYHA = New York Heart Association; EF = ejection fraction.