Summary of geometric parameters, represented as mean±SD (n=47)
| FP | SVC | LPA | RPA | LSVC (n=8) | CPA (n=8) | AZ (n=3) | |
| Normalised vessel diameter (mm/m) | |||||||
| Min | 13.1±3.4 | 10.8±2.2 | 7.8±2.3 | 9.8±2.1 | 9.2±3.7 | 7.8±3.0 | 9.2±3.7 |
| Mean | 16.0±4.0 | 12.8±2.5 | 10.6±2.1 | 11.9±2.1 | 11.1±2.6 | 10.1±2.4 | 11.1±2.6 |
| Max | 20.1±4.7 | 15.5±3.2 | 15.4±4.1 | 15.7±3.2 | 18.0±4.5 | 13.7±1.9 | 18.0±4.5 |
| Number of patients having the smallest diameter at | 2 | 2 | 31 | 7 | 3 | 1 | 1 |
| Angle between vessels (°) | FP-LPA | FP-RPA | SVC-LPA | SVC-RPA | FP-SVC | LPA-RPA | |
| 116±18 | 94±18 | 105±17 | 101±15 | 127±22 | 103±31 | ||
| TCPC diameter index (mm/m) | 10.3±1.7 | ||||||
| Normalised caval offset magnitude (mm/mm) | 0.26±0.36 | ||||||
AZ, Azygos vein, which is measured from above the diaphragm to the insertion into the SVC; CPA, central pulmonary artery (length of PA between left and right SVC); FP, Fontan pathway; LPA, left pulmonary artery; LSVC, left SVC; RPA, right pulmonary artery; SVC, superior vena cava; TCPC, total cavapulmonary connections.