Results
In twenty-one patients, 62 paired LA and RA maps were obtained. LIA was
highly spatially stable with R2 between maps of
0.83(0.71-0.88) compared to 0.39(0.24-0.57) and 0.64(0.54-0.73) for LRA
and FF, respectively. LIA was also most temporally stable with a kappa
of >0.8 reached by 12s. LRA showed greatest variability
with kappa>0.8 only after 22s. Regions of LIA were of
normal voltage amplitude (1.09mv) but showed increased conduction
heterogeneity during extrastimulus pacing (p=0.0480).