Figure 4. Correlation between LVESD
in the prone position (Y axis) and the corresponding measurement in the
supine position (x axis) ( r = 0.728. P < 0.001)
Bland-Altman plots were performed to show accuracy and agreement between
each of LVEDD, LVESD, SWT, PWT, and AoR dimensions in the prone position
versus the standard supine position. The differences between each of the
measurements were plotted against the averages of the measurements in
both positions. The mean of the difference and the upper and lower
limits of differences were estimated.
All measurements for LVEDD, LVESD, SWT, PWT and AoR dimensions in the
prone position were accurate and agreed well with their corresponding
measurements in the supine
position with very small mean differences, as shown in Table 3 .
Measurements of SWT and PWT dimensions, followed by LVES dimensions, in
the prone position were the most accurate, and agreed well with their
corresponding measurements in the supine position, as they showed the
smallest mean differences as shown in Figures 5, 6 and 7respectively. LVED dimension in the prone position was the farthest from
its corresponding measurement in the supine position (as it showed the
largest mean difference).