Results
Respiratory motion detection occurred in 8, permitting offline
retrospective comparison of RMA settings. Significant differences in
LAPW RF auto-annotation occurred according to RMA setting, with curves
displaying catheter position, CF and impedance data indicating
“best-fit” for catheter motion detection using RMA “off”. Comparing
RMA “on” versus “off”, respectively: Total annotated sites 82 versus
98; median RF duration per-site 13.3s versus 10.6s (p<0.0001);
median force time integral 177g.s versus 130g.s (p=0.0002); mean
inter-tag distance (ITD) 6.0mm versus 4.8mm (p=0.002). Considering LAPW
annotated site 1-to-2 transitions resulting from deliberate catheter
movement, 3 concurrent with inadvertent 0g CF demonstrated
<0.6s difference in RF duration. However, 13 deliberate
catheter movements during constant tissue contact (ITD range 2.1 –
7.0mm) demonstrated (mean) site-1 RF duration difference 3.7s (range:
-1.3 to 11.3s): considering multiple measures of catheter position
instability, the appropriate indication of deliberate catheter motion
occurred with RMA “off” in all.