Table 4 Individual echocardiographic parameters: no PDA versus low PDA shunt burden group.
From: Association of low shunt burden from PDA and adverse outcomes in premature infants
No burden (n = 69) | Low burden (n = 43) | p value | |
|---|---|---|---|
Iowa PDA score components | |||
Mitral valve E wave velocity, cm/s | 37.8 ± 8.8 | 43.4 ± 9.3 | <0.001 |
IVRT, msec | 49.9 ± 11.1 | 51.2 ± 11.2 | 0.448 |
Pulmonary vein D wave, cm/s | 28.3 ± 8.5 | 29.1 ± 8.3 | 0.539 |
Left atrium: aorta | 1.28 ± 0.2 | 1.33 ± 0.2 | 0.124 |
LVO:RVO | 1.07 ± 0.5 | 1.07 ± 0.3 | 0.994 |
PDA size: weight, mm/kg | 1.65 ± 1.1 | 1.06 ± 0.7 | <0.001 |
Additional TNE information and markers | |||
PMA at the time of TNE | 26.97 ± 2.1 | 27.33 ± 2.3 | 0.251 |
Weight at the time of TNE | 0.85 ± 0.3 | 0.94 ± 0.3 | 0.066 |
Pulmonary vein S wave, cm/s | 32.2 ± 8.3 | 34.9 ± 8.9 | 0.027 |
Mitral valve A wave velocity, cm/s | 52 ± 9.6 | 59.2 ± 10.4 | <0.001 |
Mitral valve E:A ratio | 0.73 ± 0.15 | 0.74 ± 0.13 | 0.799 |
TAPSE, mm | 5.2 ± 1.3 | 5.6 ± 1.3 | 0.048 |
RV S’, cm/s | 4.9 ± 1 | 5.3 ± 1.1 | 0.025 |
RV FAC, % | 0.46 ± 0.1 | 0.47 ± 0.1 | 0.492 |
EF by Simpson’s biplane, % | 66.4 ± 7.2 | 67.7 ± 6.8 | 0.224 |
LVO, ml/min/kg | 166.2 ± 42 | 192.6 ± 50 | <0.001 |
RVO, ml/min/kg | 171 ± 62 | 189.6 ± 58 | 0.040 |
PDA size, mm | 1.36 ± 0.6 | 1.02 ± 0.5 | 0.003 |
