Figure 1B: Visually estimated LVEF before and after implantation for each of the
device location groups plotted with a regression for each group.
Five patients had an initial LVEF of <50% but were included
in the analysis given that our first definition of PICM allowed for an
initial LVEF of <50%. Five patients (10.4%) met the criteria
for definition 1 of PICM, and three patients (7.0%) met the criteria
for definition 2 of PICM. For the three patients who met the criteria
for definition 2, their mean visually estimated LVEF was 55% before
implantation, and their LVEF decreased by 18% on average.
The Paired T-Test resulted in an F-statistic of -0.1778 (P value:
0.8596) which demonstrates that the difference in LVEF before and after
the device implantation was not significant. The Wilcoxon Signed-Rank
Test resulted in an F-statistic of 182.0 (P value: 0.8661) which
demonstrates that the LVEF distributions before and after the device
implantation were symmetric.