Table 1.
Catheterization, CMR, and Exercise Data
| Value | p Value | ||
|---|---|---|---|
| Mean | Median | ||
| Catheterization (n = 41) | |||
| Age at balloon dilation (yrs) | 2.3 ± 5.5 | 0.2 (0 to 26.7) | |
| Pulmonary annulus (mm) | 10.6 ± 4.6 | 9.1 (4.0 to 21.7) | |
| Pulmonary annulus z-score | −0.8 ± 1.2 | −1.0 (−3.4 to 1.7) | |
| Balloon size (mm) | 13.3 ± 5.4 | 12 (6.0 to 30.0) | |
| Balloon to annulus ratio | 1.3 ± 0.2 | 1.3 (1.0 to 2.0) | |
| RV:systemic pressure ratio (%) | 111.2 ± 40.6 | 110.2 (44.2 to 206.9) | |
| CMR imaging (n = 41) | |||
| PR percent | 14 ± 13 | 10 (1 to 45) | |
| PR volume (indexed, ml/m2) | 8.5 ± 8.6 | 5.3 (0.5 to 30.2) | |
| RV end-diastolic volume (indexed, ml/m2) | 103 ± 28 | 100 (63 to 205) | |
| RV end-diastolic volume z-score (n = 35) | 1.8 ± 1.9 | 1.5 (−0.2 to 8.4) | |
| RV stroke volume (indexed, ml/m2) | 61.5 ± 14.3 | 56.7 (40.8 to 104.3) | |
| RV EF% | 60 ± 7 | 61 (46 to 77) | |
| LV end-diastolic volume (indexed, ml/m2) | 80.8 ± 12.6 | 77.9 (52.5 to 108.5) | |
| LV end-diastolic volume z-score (n = 35) | 0.1 ± 1.0 | −0.1 (−2.3 to 2.3) | |
| LV stroke volume (indexed, ml/m2) | 50.9 ± 8.5 | 49.2 (33.6 to 70.0) | |
| LV EF% | 64 ± 6 | 63 (55 to 78) | |
| Exercise (n = 40) | |||
| Peak Vo2 (% predicted) | 92 ± 17 | 90 (61 to 126) | 0.006 |
| Peak work rate (% predicted) | 95 ± 22 | 93 (60 to 149) | 0.14 |
| O2 pulse (% predicted) | 97 ± 17 | 96 (60 to 128) | 0.66 |
| Peak HR (% predicted) | 96 ± 7 | 97 (76 to 113) | <0.001 |
| FVC (% predicted) | 101 ± 13 | 99 (68 to 125) | 0.54 |
| FEV1 (% predicted) | 100 ± 15 | 100 (64 to 132) | 0.85 |
p values for the exercise data refer to percentage predicted values compared with an average value of 100% (1- sample t test).
CMR = cardiac magnetic resonance; EF = ejection fraction; FEV1 = forced expiratory volume (1 s); FVC = forced vital capacity; HR = heart rate; LV = left ventricular; RV = right ventricular; Vo2 = oxygen consumption.