Table 2 Hemodynamic and respiratory gas variables of the subjects
Variable | All patients (n = 201) | Patients with \( \dot{\rm{V}} \)O2 overshoot (n = 10) | Patients without \( \dot{\rm{V}} \)O2 overshoot (n = 191) | p value |
|---|---|---|---|---|
At rest | ||||
LVEF (%) | 54.5 ± 15.4 | 40.1 ± 19.1 | 55.2 ± 14.9 | 0.002 |
Left ventricular diastolic dimension (mm) | 51.7 ± 7.8 | 61.9 ± 13.4 | 51.2 ± 7.2 | <0.0001 |
Left ventricular systolic dimension (mm) | 37.1 ± 10.4 | 50.3 ± 17.0 | 36.5 ± 9.5 | <0.0001 |
Heart rate (beats/min) | 75.4 ± 12.2 | 74.1 ± 14.6 | 75.5 ± 12.1 | NS |
Systolic blood pressure (mmHg) | 122.7 ± 18.7 | 122.3 ± 21.5 | 122.7 ± 18.6 | NS |
Diastolic blood pressure (mmHg) | 70.9 ± 11.1 | 69.9 ± 16.6 | 71.0 ± 10.8 | NS |
Peak exercise | ||||
Heart rate (beats/min) | 124.8 ± 19.7 | 114.5 ± 23.6 | 125.3 ± 19.4 | NS |
Systolic blood pressure (mmHg) | 185.4 ± 33.4 | 164.3 ± 45.5 | 186.5 ± 32.5 | 0.040 |
Diastolic blood pressure (mmHg) | 86.3 ± 15.7 | 91.7 ± 27.4 | 86.0 ± 14.9 | NS |
Respiratory exchange ratio | 1.09 ± 0.09 | 1.08 ± 0.14 | 1.09 ± 0.08 | NS |
\( \dot{\rm{V}} \)O2 flattening | 12 (6.0) | 3 (30.0) | 9 (4.7) | 0.020 |
Peak \( \dot{\rm{V}} \)O2 (ml/min/kg) | 17.8 ± 4.7 | 13.1 ± 6.1 | 18.1 ± 4.5 | <0.001 |
∆\( \dot{\rm{V}} \)O2/∆WR (ml/min/W) | 9.3 ± 2.0 | 6.6 ± 3.8 | 9.5 ± 1.7 | <0.0001 |
\( \dot{\rm{V}} \)E/\( \dot{\rm{V}} \)CO2 slope | 33.3 ± 8.0 | 45.0 ± 18.6 | 32.6 ± 6.6 | <0.0001 |
Magnitude of \( \dot{\rm{V}} \)O2 overshoot (%) | 6.5 ± 8.1 | |||