Table 1. Patient Characteristics.
| Group 1 (n = 42) | Group 2 (n = 41) | P | |
|---|---|---|---|
| Age | 8.0 ± 9.1 months; median, 4 months; range, 1 day–3 years | 9.6 ± 14.2 months; median, 4 months; range, 1 day–4 years | 0.5 |
| Male to female ratio | 25:17 | 14:27 | - |
| Diagnosis | Tetralogy of Fallot, 18; functional single ventricle, 5; double outlet right ventricle, 5; ventricular septal defect, 3; coarctation of aorta, 3; left pulmonary artery sling, 2; transposition of great arteries, 2; interrupted aortic arch, 1; pulmonary atresia with ventricular septal defect and multiple aortopulmonary collateral arteries, 1; Williams syndrome, 1; negative (suspected vascular ring at echocardiography), 1 | Tetralogy of Fallot, 11; coarctation of aorta, 8; functional single ventricle, 5; atrial septal defect, 2; total anomalous pulmonary venous return, 2; double outlet right ventricle, 1; atrial and ventricular septal defects, 1; atrioventricular septal defect, 1; patent ductus arteriosus, 1; interrupted aortic arch, 1; partial anomalous pulmonary venous return, 1; vascular ring, 1; Ebstein anomaly, 1; Williams syndrome, 1; Loeys Dietz syndrome, 1; Allagile syndrome, 1; aortic stenosis, 1; negative (suspected double outlet right ventricle at echocardiography), 1 | - |
| Arm position | Both up, 28; both horizontal, 7; both down, 5; one horizontal and one up, 1; one down and one horizontal, 1 | Both up, 25; both horizontal 9; both down, 4; one horizontal and one up, 3 | - |
| Abody (cm2) | 149.8 ± 26.4 | 145.6 ± 53.1 | 0.6 |
| Dbody (HU) | −197.0 ± 46.0 | −200.6 ± 55.6 | 0.7 |
| Aw (cm2) | 120.0 ± 20.3 | 115.6 ± 41.5 | 0.6 |
| AP (cm) | 10.3 ± 1.4 | 10.1 ± 1.9 | 0.5 |
| LAT (cm) | 15.2 ± 1.5 | 14.4 ± 2.8 | 0.1 |
| Deff (cm) | 12.5 ± 1.3 | 12.0 ± 2.0 | 0.2 |
Abody = cross-sectional area, AP = anteroposterior diameter, Aw = water equivalent area, Dbody = body density, Deff = effective diameter, HU = Hounsfield unit, LAT = lateral diameter