Table 4.
Aortic Wave Analysis
| Coarctation (n=30) | Control (n=28) | Unadjusted P Value | Difference in Means (±95% CI)a | P Valuea | |
|---|---|---|---|---|---|
| c, m/s | 3.44 (3.18, 4.00) | 3.13 (2.90, 3.57) | 0.03b | 0.32 (−0.04, 0.69) | 0.08 |
| Zc, g.cm2/s | 121 (95, 143) | 89 (75, 98) | <0.001b | 38 (17, 59) | 0.001 |
| Cumulative intensity, W/m2/s×104 | |||||
| FCW | 2.26 (1.76, 3.74) | 1.56 (1.36, 2.15) | 0.01b | 1.16 (0.31, 2.00) | 0.008 |
| BCW | −0.44 (−0.56, −0.33) | −0.42 (−0.48, −0.25) | 0.37b | −0.23 (−0.43, −0.03) | 0.02 |
| FDW | 0.49 (0.34, 1.27) | 0.24 (0.18, 0.39) | <0.001b | 0.44 (0.13, 0.75) | 0.007 |
| BCW:FCW cumulative intensity ratio | 0.26±0.16 | 0.27±0.13 | 0.76 | −0.01 (−0.10, 0.07) | 0.77 |
| Cumulative power, W/s | |||||
| FCW | 7.29 (4.96, 18.46) | 6.43 (5.01, 9.06) | 0.49b | 0.32 (−0.11, 0.74) | 0.14 |
| BCW | −1.52 (−2.69, −1.01) | −1.80 (−2.25, −1.02) | 0.92b | −0.81 (−2.04, 0.41) | 0.19 |
| FDW | 1.70 (1.01, 4.20) | 1.03 (0.79, 1.54) | 0.04b | 0.17 (−0.01, 0.35) | 0.06 |
| BCW:FCW CP ratio | 0.19 (0.14, 0.33) | 0.27 (0.15, 0.34) | 0.41b | −0.12 (−0.98, 0.65) | 0.69 |
| ΔP, mm Hg | |||||
| FCW | 23.1 (20.7, 32.0) | 20.5 (18.4, 23.7) | 0.03b | 5.28 (1.00, 9.55) | 0.02 |
| BCW | 8.9 (7.7, 12.2) | 8.4 (6.1, 9.5) | 0.14b | 2.44 (0.46, 4.42) | 0.02 |
| FDW | −10.9 (−14.7, −7.6) | −6.6 (−9.6, −5.2) | 0.003b | −5.00 (−8.96, −1.03) | 0.02 |
| BCW:FCW ΔP ratio | 0.45±0.16 | 0.44±0.14 | 0.71 | 0.01 (−0.08, 0.10) | 0.81 |
Data are mean±SD. BCW indicates backward‐running compression wave; c, local aortic wave speed; CP, cumulative power; FCW, initial systolic forward‐running compression wave; FDW, late‐systolic forward‐running decompression wave; Zc, characteristic impedance; ΔP, pressure change related to a given wave.
a
Data adjusted for age and sex.
b
Median (25th, 75th percentiles) Mann–Whitney U test.