Pre-implant and post-implant echocardiographic parameters of
study patients
At pre-implant, group 1 had significantly larger LA dimension (group 1
vs. group 2; 37.8 ± 6.6 mm vs. 36.7 ± 6.3 mm; p = 0.063) and
significantly higher average TRPG (group 1 vs. group 2; 23.1 ± 4.9 mmHg
vs. 20.7 ± 6.1 mmHg; p < 0.001) than group 1 (Table 2). The
two groups did not differ in LVEDV and LVEF.
The median follow-up period was similar between the two groups (group 1
vs. group 2; 4.7 (4.4-5.4) years vs. 4.5 (4.2-4.8) years; p = 0.610). At
post-implant, group 1 had significantly larger LA dimension, lower LVEF
and more severe TR grade than group 2. Additionally, group 1 had
significantly higher post-implant TRPG (group 1 vs. group 2; 35.9 ± 9.1
mmHg vs. 21.8 ± 5.4 mmHg; p < 0.001) and larger changes in
post-implant TRPG (group 1 vs. group 2; 12.8 ± 9.6 mmHg vs. 1.1 ± 7.6
mmHg; p < 0.001) than group 2. Figure 2 showed the changes in
pre-implant and post-implant TRPG in group 1 (p < 0.001).
Figure 3 shows the cumulative incident rate of progressive TR grade
and/or abnormal TRPG from 1.3% in the first year to 18.4% in the sixth
year in the study cohort.