Table 2.
Comparison of conduit parameters between patients with oversized and non-oversized conduits.
| Variable | Oversized (n = 44) | Non-oversized (n = 42) | p value |
|---|---|---|---|
| Age at Fontan procedure, year | 2.8 (1.6–5.8) | 2.7 (1.8–9.7) | 0.766 |
| Weight at Fontan procedure, kg | 13.0 (10.4–18.2) | 14.1 (10.0–25.7) | 0.010 |
| Body surface area at Fontan procedure, m2 | 0.58 (0.49–0.73) | 0.60 (0.47–0.97) | 0.056 |
| Simple cardiac situs and position | 29 (65.9) | 30(71.4) | 0.581 |
| Apicocaval juxtaposition | 13 (29.5) | 12 (28.6) | 0.921 |
| Bilateral bidirectional cavopulmonary connection | 12 (27.3) | 9 (21.4) | 0.528 |
| Normalized original conduit area, mm2/m2 | 600.4 (524.0–694.0) | 475.1 (261.7–556.9) | <0.001 |
| Interval from Fontan procedure, year | 13.0 ± 3.6 | 13.1 ± 3.2 | 0.0871 |
| Minimum conduit area, mm2 | 227.1 ± 38.2 | 175.2 ± 46.5 | <0.001 |
| Normalized minimum conduit area, mm2/m2 | 148.6 (88.6–278.4) | 109.9 (32.6–208.6) | <0.001 |
| Maximum percent stenosis, % | 34.5 (20.3–56.7) | 33.1 (6.9–79.1) | 0.809 |
| Minimum conduit area/IVC area, % | 47.7 (21.9–95.2) | 41.0 (10.8–73.3) | 0.010 |
| Aspect ratio | 1.41 (1.04–2.30) | 1.46 (1.11–8.98) | 0.766 |
| Tortuosity, % | 103.8 (100.3–115.8) | 104.9 (100.3–131.5) | 0.063 |
| Location of the minimum conduit area | 0.019 | ||
| Upper third | 11 (25.0) | 5 (11.9) | |
| Middle third | 15 (34.1) | 27 (64.3) | |
| Lower third | 18 (40.9) | 10 (23.8) | |
| Mechanism for narrowing of the conduit | |||
| Luminal irregularity | 11 (25.0) | 9 (21.4) | 0.695 |
| Calcification | 32 (72.7) | 32 (76.2) | 0.713 |
| Pseudointimal hyperplasia or mural thrombus | 37 (84.1) | 21 (50.0) | 0.001 |
Data are expressed as mean ± standard deviation, median (range), or number (%).
n = number; IVC = inferior vena cava.