Table 4.
Cardiopulmonary exercise test results of patients in the Fontan operation group and controls.
| Variables | Fontan Group (n = 30) | Controls (n = 30) | p-Value |
|---|---|---|---|
| Exercise time, min | 13.5 (3.4) | 16.65 (2.7) | <0.001 |
| Sat. O2 rest, % | 92.0 (89.0–93.0) | 97.0 (96.0–98.0) | <0.001 |
| Sat. O2 exercise, % | 87.0 (84.0–89.0) | 97.0 (96.0–97.0) | <0.001 |
| Peak VO2 per kg, mL/kg/min | 20.6 (18.2–23.2) | 50.9 (46.5–54.1) | <0.001 |
| Peak VO2, %n | 55.0 (48.0–63.0) | 97.0 (95.0–98.0) | <0.001 |
| VE | 46.0 (35.0–63.0) | 123 (97–138) | <0.001 |
| VE/VCO2, L/L | 33.3 (3.9) | 26.5 (2.9) | <0.001 |
| RER peak | 1.0 (0.08) | 1.1 (0.9) | 0.01 |
| Chronotropic index | 0.55 (0.47–0.62) | 0.93 (0.88–0.99) | <0.001 |
| HRR | 32.0 (24.0–60.0) | 8.0 (1.0–14.0) | <0.001 |
Continuous data are presented as mean (SD) or median (Q1–Q3). Abbreviations: HRR, heart rate reserve; peak VO2 per kg, peak oxygen uptake per kilogram; peak VO2 (%n), percentage of predicted value for peak oxygen uptake; RER peak, peak respiratory exchange ratio; Sat. O2, oxygen saturation; VE, minute ventilation; VE/VCO2, peak ventilatory equivalent of CO2.