Table 4.
Correlation coefficients between clinical and exercise data and cardiac output responses during exercise and recovery.
| Resting CO | Resting CI | Resting dX/dt | Resting heart rate | Resting VET | Age | Ejection fraction | Peak heart rate | Peak VO2 | VO2 VT | VE/VCO2 slope | OUES | Peak CO | Peak CI | Peak dX/dt | Recovery slope | Rec Time Constant | |
| Resting CO | -- | -- | |||||||||||||||
| Resting CI | 0.91** | -- | -- | ||||||||||||||
| Resting dX/dt | 0.64** | 0.81** | -- | ||||||||||||||
| Resting heart rate | 0.36** | 0.43** | 0.28* | -- | |||||||||||||
| Resting VET | 0.00 | 0.03 | -0.21 | -0.03 | -- | ||||||||||||
| Age | -0.03 | -0.09 | -0.03 | -0.13 | -0.23 | -- | |||||||||||
| Ejection fraction | 0.07 | 0.18 | -0.08 | -0.04 | 0.30* | -0.17 | |||||||||||
| Peak heart rate | 0.36** | 0.48** | 0.13* | 0.33** | 0.41** | -0.48** | 0.39** | -- | |||||||||
| Peak VO2 | 0.16 | 0.19 | 0.06 | 0.08 | 0.36** | -0.46** | 0.40** | 0.70** | -- | ||||||||
| VO2 VT | 0.12 | 0.19 | 0.14 | -0.05 | 0.23 | -0.32* | 0.23 | 0.39** | 0.74** | -- | |||||||
| VE/VCO2 slope | -0.08 | -0.02 | 0.05 | 0.09 | -0.06 | -0.45** | -0.19 | -0.35** | -0.57** | -0.52** | -- | ||||||
| OUES | 0.37** | 0.19 | 0.00 | -0.05 | 0.20 | -0.32** | 0.22 | 0.49** | 0.74** | 0.66** | 0.68** | -- | |||||
| Peak CO | 0.13 | -0.02 | 0.26* | 0.05 | 0.26* | -0.43** | 0.07 | 0.48** | 0.45** | 0.36** | -0.39** | 0.66** | -- | ||||
| Peak CI | 0.02 | -0.01 | 0.22 | 0.12 | 0.29* | -0.54** | 0.14 | 0.54** | 0.53** | 0.40** | -0.38** | 0.54** | 0.94** | -- | |||
| Peak dX/dt | 0.30* | 0.40** | 0.22 | 0.17 | 0.16 | -0.58** | 0.13 | 0.48 | 0.52** | 0.39** | -0.31* | 0.40** | 0.60** | 0.72** | -- | ||
| Recovery slope | -0.02 | -0.03 | 0.14 | 0.04 | -0.35* | 0.45** | -0.34* | -0.61** | -0.72** | -0.58** | 0.57** | -0.58** | -0.50** | -0.57** | -0.46** | -- | |
| Rec time constant | -0.04 | 0.05 | 0.24 | 0.00 | -0.16 | 0.11 | -0.17 | -0.38** | -0.51** | -0.44** | 0.45** | -0.51** | -0.41** | -0.41** | -0.29* | 0.74** | -- |
p<0.05.
**p<0.01.
CO = cardiac output, ml/kg/min; CI = cardiac index, L/min/m2; dX/dt = peak aortic flow; BP = blood pressure, mmHg; VET = ventricular ejection time, msec.
VO2VT = oxygen uptake at the ventilatory threshold, ml/kg/min; OUES = oxygen uptake efficiency slope; Rec = recovery.