Table 2.
CMR and EST characteristics (n = 125)
| Variable | Value |
|---|---|
| CMR | |
| RVEF (%) | 60.6 ± 8.3 |
| RVEF | |
| <50% (n = 13) | 46 ± 4 |
| ≥50% (n = 112) | 62 ± 7 |
| RV cardiac output (L/min) | 7.2 ± 2.5 |
| RV cardiac index (L/min/m2) | 5.5 ± 1.5 |
| RV stroke volume (mL) | 92.8 ± 37 |
| RV stroke volume index (mL/m2) | 70.3 ± 19.3 |
| RVEDV (mL) | 155.2 ± 63 |
| Indexed RVEDV (mL/m2) | 117.7 ± 34.4 |
| RVESV (mL) | 62.4 ± 31.2 |
| Indexed RVESV (mL/m2) | 47 ± 20 |
| Pulmonary regurgitant fraction (%) | 34.1 ± 16.73 |
| RV mass (g) | 91 (67–127) |
| RV mass (g/m2) | 76 (58–93) |
| Pulmonary insufficiency* | |
| Mild or less | 20 (16%) |
| Moderate | 49 (39%) |
| Severe | 50 (40%) |
| Regional wall motion abnormalities† | |
| Yes | 111 (89%) |
| No | 13 (10%) |
| Left ventricular ejection fraction (%) | 68.4 ± 7.1 |
| EST | Overall (n = 125) | RER > 1.1 (n = 73) | RER ≤ 1.1 (n = 52) |
|---|---|---|---|
| Peak VO2 (mL/kg/min) | 31.7 ± 8.41 | 33. 5 ± 7.8 | 29.2 ± 8.4 |
| VO2 (L/min) | 1.34 ± 0.56 | 1.56 ± 0.53 | 0.96 ± 0.38 |
| VO2max% | 76 ± 18.4 | 80 ± 18 | 70 ± 18 |
| Maximum work (W) | 114 ± 48.6 | 128.1 ± 50 | 84.3 ± 29 |
| Oxygen pulse (mL/beat) | 7.4 ± 3 | 8.58 ± 2.9 | 5.63 ± 2.1 |
| RER | 1.14 ± 0.13 | 1.22 ± 0.9 | 1.02 ± 0.07 |
| VE/VCO2 at anaerobic threshold | 39 ± 6.9 | 37.8 ± 6.61 | 42.3 ± 6.73 |
| VE/VCO2 slope | 37.9 ± 8.23 | 35.7 ± 6 | 41.6 ± 10.1 |
| Measured anaerobic threshold | 89 (68%) | 65 (86%) | 24 (48%) |
RER, Respiratory exchange ratio.
Data are expressed as mean ± SD, number (percentage), or median (interquartile range).
*
Not assessed in six subjects.
†
Not assessed in one subject.