Table 5.
Univariate and multiple regression models to assess relationships between parameters of LV remodelling and flow parameters. In univariate models only significant associations (p<0.05) are shown. LVMI-I = Left ventricular mass index, RWM = Relative wall mass, WSS = wall shear stress
| Model | Remodeling parameter |
Independent variable | Estimate | p-value |
|---|---|---|---|---|
| Univariate models: | ||||
| linear regression | LVM-I | vortical flow formation | 10.94 ± 4.54 | 0.0213 |
| normalized flow displacement, S2 | 172.00 ± 81.04 | 0.0410 | ||
| normalized flow displacement, S3 | 185.61 ± 62.94 | 0.0056 | ||
| WSSpeak, S2 | 23.47 ± 10.15 | 0.0268 | ||
| linear regression | RWM | vortical flow formation | 0.18 ± 0.07 | 0.0115 |
| eccentricity | 0.29 ± 0.13 | 0.0270 | ||
| normalized flow displacement, S2 | 3.65 ± 1.11 | 0.0023 | ||
| normalized flow displacement, S3 | 2.65 ± 0.94 | 0.0076 | ||
| logistic regression | LV-remodeling | vortical flow formation | 0.92 ± 0.42 | 0.0285 |
| normalized flow displacement, S2 | 16.53 ± 8.28 | 0.0459 | ||
| Final multiple models, after stepwise selection: | ||||
| linear regression | LVM-I | age* | −0.48 ± 0.33 | 0.15 |
| systolic blood pressure* | −0.24 ± 0.26 | 0.36 | ||
| aortic orifice area* | −13.84 ± 7.11 | 0.0611 | ||
| normalized flow displacement, S3 | 195.40 ± 65.82 | 0.0058 | ||
| linear regression | RWM | age* | −0.003 ± 0.005 | 0.50 |
| systolic blood pressure* | 0.002 ± 0.003 | 0.55 | ||
| aortic orifice area* | −0.28 ± 0.10 | 0.0058 | ||
| normalized flow displacement, S3 | 2.01 ± 0.87 | 0.0283 | ||
| WSSpeak, S2 | −0.29 ± 0.15 | 0.0691 | ||
| logistic regression | LV-remodeling | age* | 0.05 ± 0.04 | 0.27 |
| systolic blood pressure* | 0.004 ± 0.03 | 0.87 | ||
| aortic orifice area* | −2.27 ± 0.97 | 0.0195 | ||
parameter forced into the model