Table 3

 Regression correlations for exercise versus standard echocardiographic and TDi values

pV˙o2e/V˙co2 slope
***p<0.0001; **p<0.001; *p<0.05; ns, non-significant for the correlation between the exercise variables and both groups, or patients and controls separately.
A, peak velocity of atrial filling; Am, atrial diastolic TDi wave; C, control; DT, deceleration time; E wave, peak velocity of early ventricular filling; EF, ejection fraction; Em, early diastolic TDi wave; P, patient; pV˙o2, peak oxygen consumption; V˙e/V˙co2 slope, slope relating ventilation to carbon dioxide production; Sm, late systolic myocardial motion; TDi, tissue Doppler imaging.
EF (%)C0.66***0.20ns−0.41***−0.25ns
P0.21*−0.04ns
E wave (cm/s)C−0.22*0.17ns0.30***0.05ns
P−0.22*0.26**
A wave (cm/s)C0.08ns−0.26ns0.26**−0.01ns
P0.09ns−0.26*
E/A ratioC−0.25**0.30*0.38***0.01ns
P−0.20*0.32**
DT (ms)C0.25**−0.14ns0.31***0.13ns
P0.17*−0.25*
Left ventricle
Sm (cm/s)C0.67***0.5**−0.51***−0.36*
P0.35***−0.34***
Em (cm/s)C0.67***0.51**−0.31***−0.24ns
P0.20*−0.11ns
Am (cm/s)C0.72***0.27ns−0.51***−0.33*
P0.23*−0.35***
Em/AmC−0.02ns0.35*0.21*−0.09ns
P0.01ns0.19*
E/EmC−0.58***−0.47**0.34***0.27ns
P−0.27**0.20*
A/AmC−0.36***−0.35*0.28**0.27ns
P−0.02ns0.17ns
Right ventricle
Sm (cm/s)C0.39***0.04ns−0.31***−0.13ns
P0.12ns−0.19*
Em (cm/s)C−0.47***0.07ns0.26**−0.08ns
P0.02ns0.03ns
Am (cm/s)C−0.11ns0.36*−0.04ns0.07ns
P0.02ns−0.17*
Em/AmC0.54***−0.11ns−0.26*−0.27ns
P−0.15ns0.23*
E/EmC−0.34***0.24ns0.28**0.08ns
P−0.09ns0.09ns
A/AmC−0.14*−0.08ns0.11ns−0.17ns
P−0.18ns0.27**