Table 6.
Comparison between RPI-positive group and RPI-negative group.
| Variables | RPI-positive group (n = 49) |
RPI-negative group (n = 61) |
p value |
|---|---|---|---|
| Side, right/left, n (%) | 28 (57.1)/21 (42.9) | 44 (72.1)/17 (27.9) | 0.10 |
| Lobe, superior/middle/inferior, n (%) | 11 (22.4)/0 (0)/38 (77.6) | 11 (18.0)/2 (3.3)/48 (78.7) | 0.51 |
| Vessel expansion ratio | 1.64 ± 0.45 | 2.45 ± 6.21 | 0.25 |
| Balloon-vessel ratio | 0.89 ± 0.19 | 0.89 ± 0.22 | 0.99 |
| Pre-BPA Pp, mm Hg | 30.3 ± 6.1 | 23.4 ± 7.4 | < 0.01 |
| Pre-BPA Pd, mm Hg | 11.8 ± 7.6 | 10.9 ± 6.8 | 0.53 |
| Pre-BPA pressure ratio | 0.40 ± 0 .27 | 0.46 ± 0.23 | 0.23 |
| Post-BPA Pp, mm Hg | 29.5 ± 6.2 | 22.7 ± 7.2 | < 0.01 |
| Post-BPA Pd, mm Hg | 24.3 ± 6.4 | 16.4 ± 7.2 | < 0.01 |
| Post-BPA pressure ratio | 0.83 ± 0.14 | 0.71 ± 0.21 | < 0.01 |
| Pd increase, mm Hg | 12.5 ± 8.4 | 5.5 ± 5.0 | < 0.01 |
Values are mean ± SD or percent. BPA, balloon pulmonary angioplasty; Pd, mean pulmonary arterial pressure distal to the stenosis measured by the pressure wire sensor; Pp, mean pulmonary arterial pressure proximal to the stenosis measured by the guiding catheter.