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 |
VO = 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.
