Comparison between children who did and did not require conduit replacement <1 year after stent implantation
| Conduit replacement | p Value* | ||
|---|---|---|---|
| <1 year (n = 8) | >1 year (n = 51) | ||
| Data are median (range) or mean (SD). | |||
| *From unpaired t tests; *Mann-Whitney U test. | |||
| Age at conduit insertion (years) | 4 (6 months to 15 years) | 3 (1 day to 9 years) | 0.19† |
| Data at initial catheter intervention | |||
| Age (years) | 11 (4–16 years) | 6 (7 months to 19 years) | <0.05† |
| Balloon diameter as percentage of predicted RVOT diameter | 72 (13) | 85 (13) (n = 49) | <0.05 |
| Before catheter intervention | |||
| Percentage predicted RVOT area for BSA | 10 (3) (n = 7) | 17 (7) (n = 47) | <0.05 |
| RV pressure (mm Hg) | 65 (18) | 69 (17) | 0.56 |
| RVOT peak to peak systolic gradient (mm Hg) | 47 (18) | 47 (17) (n = 46) | 0.99 |
| Ratio of RV to systemic arterial systolic pressure | 0.76 (0.20) | 0.77 (0.20) | 0.90 |
| After catheter intervention | |||
| Percentage predicted RVOT area for BSA | 22 (10) (n = 7) | 43 (18) (n = 48) | <0.01 |
| RV pressure (mm Hg) | 48 (22) | 46 (11) | 0.64 |
| RVOT peak to peak systolic gradient (mm Hg) | 32 (21) | 19 (12) (n = 49) | <0.05 |
| Ratio of RV to systemic arterial systolic pressure | 0.54 (0.19) | 0.47 (0.11) (n = 49) | 0.18 |