Decrease in RIMP during the neonatal period in infants who did or did not develop BPD (median and quartile values presented).

<p>Decrease in RIMP during the neonatal period in infants who did or did not develop BPD (median and quartile values presented).</p

Patient characteristics (presented as median values with quartiles (in brackets) or N (%)).

<p>Statistically significant p-values are printed in bold.</p

Correlation of RIMP with clinical and hemodynamic parameters at the 4 time points of measurement (Spearman rank order correlation coefficients and p values).

<p>Statistically significant p values are printed in bold.</p

Doppler methodology.

<p>Measurement of the myocardial performance index by pulsed Doppler in the right ventricle capturing inflow and outflow. The “a” interval is the time from tricuspidal closing to opening, and the “b” interval is the ejection time in milliseconds.</p

Flow diagram of the study population.

<p>Flow diagram of the study population.</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

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

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

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

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