Table 3 Pulmonary arterial wave intensity parameters
From: Variable open-end wave reflection in the pulmonary arteries of anesthetized sheep
Parameters | Values | P |
|---|---|---|
Peak wave intensity (×104 W m−2 s−2) | ||
Early forward compression | 78.7 ± 43.3 | <0.0001 |
Forward expansion | 23.1 ± 12.5 | <0.0001 |
Late Forward compression | 3.3 ± 2.9 | <0.0001 |
Backward expansion | 1.3 ± 1.5 | <0.0001 |
Backward compression | 1.4 ± 1.1 | <0.0001 |
Cumulative wave intensity (×102 W m−2 s−1) | ||
Early forward compression | 238.0 ± 108.0 | <0.0001 |
Forward expansion | 117.2 ± 56.1 | <0.0001 |
Late forward compression | 9.2 ± 6.5 | <0.0001 |
Backward expansion | 2.7 ± 3.4 | <0.0001 |
Backward compression | 4.6 ± 3.4 | <0.0001 |
Proportion of cumulative wave intensity (%) | ||
Early forward compression | 62.7 ± 10.0 | <0.0001 |
Forward expansion | 31.6 ± 9.4 | <0.0001 |
Late forward compression | 3.2 ± 2.7 | <0.0001 |
Backward expansion | 1.0 ± 1.2 | 0.0001 |
Backward compression | 1.5 ± 1.3 | <0.0001 |
Wave speed (m s−1) | 2.1 ± 0.3 | <0.0001 |
Peak blood velocity (m s−1) | 0.88 ± 0.01 | <0.0001 |
Distance to reflection site (cm) | ||
Backward expansion | 2.9 ± 0.8 | <0.0001 |
Backward compression | 21.2 ± 4.4 | <0.0001 |
Reflection coefficient | ||
BEW/eFCW | −0.01 ± 0.01 | 0.45 |
BCW/eFCW | 0.02 ± 0.01 | 0.0005 |