Development of systolic blood pressure (top) and left ventricular cardiac output (bottom) in VLBW infants with and without BPD during the first four weeks of life (the mode of presentation is the same as that in Figure 2).

<p>* - p<0.05; ** - p<0.01; *** - p<0.001</p

Development of body weight (top) and body length (bottom) in VLBW infants with and without BPD during the first four weeks of life.

<p>Presented are median with interquartile range; statistical significant differences between the patient groups are marked: *** - p<0.001.</p

Influence of BPD development and hemodynamically patent ductus arteriosus (hsPDA) on the measured parameters during the neonatal period.

<p>Presented are the p-values of the ANOVA for repeated measurements with the patient group as between-subject factor; p-values for statistically significant effect after Bonferroni correction (p<0.0023) are printed in bold.</p><p>DOL - Day of life, LVO - Left ventricular output.</p><p>Influence of BPD development and hemodynamically patent ductus arteriosus (hsPDA) on the measured parameters during the neonatal period.</p

Development of fractional shortening in VLBW infants with and without BPD during the first four weeks of life (the mode of presentation is the same as that in Figure 2).

<p>* - p<0.05; *** - p<0.001</p

Development of anthropometric, conventional hemodynamic and speckle tracking parameters during the neonatal period.

<p>Presented are median and interquartile range in brackets; statistically significant p-values of the Friedman test after Bonferroni correction (p<0.0023) are printed in bold.</p><p>N- Number of infants with complete data in the follow up, DOL- day of life, LVO - Left ventricular output.</p><p>Development of anthropometric, conventional hemodynamic and speckle tracking parameters during the neonatal period.</p

Comparison of intra- and inter-observer variability of the speckle tracking parameters by the coefficient of variation and intraclass-correlation coefficient.

<p>Presented are median and interquartile range; statistical significance after Bonferroni correction for p<0.0036.</p>1)<p>Comparison of the coefficient of variation between intra-and inter-observer variability.</p><p>Comparison of intra- and inter-observer variability of the speckle tracking parameters by the coefficient of variation and intraclass-correlation coefficient.</p

Measurement of peak systolic strain and strain rate.

<p>(A) 2D apical four-chamber view of the left ventricle with region of interest (in color with each color representing one of six segments) encompassing endo- and epicardium for 2D strain and strain rate analysis. (B) Global longitudinal strain (white dotted line) was calculated by averaging measurements of six segments in the apical four-chamber view. (C) Global longitudinal strain rate (white dotted line) was calculated by averaging measurements of six segments in the apical four-chamber view.</p

Characteristics of the study population (N = 119) (Data given as median (IQR) or n(%)).

<p>Characteristics of the study population (N = 119) (Data given as median (IQR) or n(%)).</p

Intra-observer variability of the speckle tracking parameters measured by the coefficient of variation of repeated measurements at day of life (DOL) 1, 7, 14, and 28.

<p>Presented are median and interquartile range, statistical significance after Bonferroni correction for p<0.0036.</p><p>Intra-observer variability of the speckle tracking parameters measured by the coefficient of variation of repeated measurements at day of life (DOL) 1, 7, 14, and 28.</p